Chapter Text
The sky above London was set ablaze. Monstrous flames of crimson vengeance and orange wrath consumed the horizon, turning the corrupt old world to ash. Every piece of William James Moriarty’s grand puzzle had fallen perfectly into place, exactly as he had orchestrated. The city was burning, the sin was being purged, and Sherlock Holmes had the Lord of Crime cornered at the precipice of the end.
It was a flawless masterpiece of tragedy.
So why, when Sherlock extended his hand, did the perfect script shatter?
William felt a suffocating lump rise in his throat. A violent, squeezing ache seized his heart, physically pulling him toward the detective. In that singular, desperate gesture, the months of intellectual chasing, the shared secrets, and the quiet understanding between them coalesced into a terrifying clarity.
It had happened gradually, the slow shifting of the tides within William’s heart. Sherlock was no longer a pawn. He was no longer just a rival. Somewhere along the way, the man who was supposed to be his ultimate instrument of justice had transcended the game entirely. He had become a cherished friend William desperately wished he could keep.
And from there Sherlock Holmes had been it all from a curious stranger, to a perfect rival to a true friend, then a lifeline, and finally, an irreplaceable love. William found himself longing for impossibilities: to hold the detective close, to bask in the warmth of his genuine smile, and to walk beside him and to tether their souls together for eternity. Yet, every time the craving surfaced, the cold weight of his sins crushed it. But a villain’s hands are meant for blood, not for holding the man he loves. A villain born to burn could not dare to possess a love so pure.
Sherlock's words of desperate raw insistence echoed in William's heart. Sherlock’s persistence he when said William must live, on finding another path and to bear the crushing weight of their sins together rather than die alone
Yet all those words zoned out in Willaim’s mind like sounds were muted and drowned— like William was hearing it through water.All that remained was the piercing clarity of Sherlock’s gaze. Those expressive blue eyes flared with a desperate brilliance. They were wide with panic and devotion, making William’s heart flutter with a sudden, aching warmth. Hope, fragile and dangerous, ignited within him.
But he knew too well the catastrophic cost of surrender. To indulge in these feelings would shatter everything. It would complicate the finale, spiraling out of control until his accomplices were dragged down into his public ruin and forced to face execution. He refused to let those he cherished suffer for his sins. Albert, Louis, Moran, Fred, and Von Herder—they had all been entirely willing to die by his side. Yet William desperately wanted them to survive, to breathe the clean air of the bright tomorrow they had bled for. They were seconds away from attaining a world freed from corruption after years of agonizing, meticulous planning. And now, looking into those desperate blue eyes, he realized he wanted that same beautiful future for Sherlock, too—even if it meant William had to be erased from it entirely.
William lets the wind blow in his hair, grounding himself—
Then William surrendered to the void. He let the rushing wind tear through his hair, he leaned back letting gravity take a violent hold of his limbs, pulling him down from the edge of the bridge. But as the world rushed upward, time froze. He caught the expression in Sherlock’s eyes– a flash of pure unadulterated panic like it was losing william was bone chilling. Like William’s life was something infinitely more precious than his own.
Those eyes, usually so confident, brave, and blazing with fierce determination, were entirely drowned in terror. Sherlock extended a desperate hand, sprinting toward the precipice. His blue eyes dilated so violently that the blown-wide pupils swallowed the irises entirely, bleeding out into an unblinking gaze of absolute horror.
The sight made William’s heart squeeze with an agonizing pang. “No,” he thought desperately, “I didn't want this expression of pure agony on his face to be the last memory of him I carry into the dark.”
William could hear the thundering rhythm of Sherlock’s erratic footsteps as he sprinted blindly toward the edge, his outstretched hand cutting through the empty air in a frantic bid to defy gravity to reach and grab William.
Then, the terror in Sherlock's eyes fractured, replaced by an iron, unyielding determination and absolute, reckless resolve. Without a single second of hesitation or single shred of self preservation he followed William. Sherlock didn't just fall—he leaped, driving his entire weight forward into a freefall to bridge the gap between them as he hurled his entire weight into the abyss to chase William down.
The impact was jarring, a violent collision of heat and racing heartbeats. Sherlock locked his arms around William’s frame, Sherlock hauled him close, squeezing him so fiercely it stole the breath from his lungs, flatly refusing to let go— crushing him against his chest with a terrifying tenacity that promised he would never let go, not even as they were punching themselves into death.
"Did you think that would stop me, you idiot?!" Sherlock roared, his words torn apart by the wind, heavy with tears and fury. "Why?! Why won't you fight for yourself?! I refuse to let this be the end... I won't let you go! I can’t lose you! I can't live in a world without you!"
For a fraction of a second, the universe paused. A profound, aching relief washed over William. William let his defenses crumble, melting completely into the suffocating warmth of Sherlock's embrace. Surrounded by the scent of tobacco and pure, unadulterated devotion, he leaned entirely into the detective's burning warmth, dropping his head against Sherlock's neck. He chose to survive in that embrace, just as the icy, violent dark and merciless maw of the river swallowed them whole.
The dark river fought to keep them, but Sherlock refused to yield. With frantic, splashing strokes, he fought against the heavy current, burning the last of his strength to drag them both upward. William's limbs felt impossibly heavy, deadened by a profound exhaustion that seeped straight into his bones.
"Swim, damn you!" Sherlock choked out, a mix of panic and fierce frustration bleeding into the dark night. "I need a little help here, Liam..." Even as his own strength waned, his hold on William’s waist was a desperate, unbending vice, fighting the river's undertow.
William took a deep, shivering breath of air, the cold stinging his throat. He looked at the frantic, beautiful determination written across Sherlock's face—the man who had rewritten his perfect tragedy just by refusing to let him go. "You are truly something else, Sherly," William whispered, his voice a soft, exhausted contrast to the roaring river.”
Sherlock’s eyes narrowed with a furious anger at William’s resignation. "Were you really just going to let it all end?!" he exclaimed, his voice competing with the rushing water. "Just leave us all behind... leave me behind?! How could you... you reckless idiot!"
William looked at him, his gaze heavy with certainty. "What good will my life do now? If I stay, the hunt will never end. The authorities will investigate, they will find the others, and everyone I love will be in danger. I want them to live. Louis, Albert, Fred, Moran—they deserve to breathe the air of the world we worked to create. I want them to have a future."
Sherlock held him steady, his hands firm on William’s wet clothes. "You think they'd be happy knowing they lived because you didn't?! They would spend the rest of their days in distress, mourning your loss! They all care about you. And if you truly want to save and protect those who protect you, then understand this—they need you by their side. Live for them. Because they cannot survive without you—”
“I know I can't live without you,” Sherlock continued, his voice cracking with an emotion he could no longer contain.
They were floating precariously in the dark water, but Sherlock shifted his hands, gently but firmly turning William so they were forced to look face-to-face.
“I love you William James Moriarty… and I refuse to let you do this to yourself” " Sherlock's grip tightened to an agonizing, desperate vice, anchoring William completely against the violent pull of the tide, as if his very touch could tether William back to life.
Sherlock leaned in and closed the final distance between them, pressing his lips to William’s. It was a kiss born of pure, breathless relief and unadulterated devotion—sweet and fierce, yet tasted faintly of the earthy river water. Sherlock stopped holding back. Every drop of affection he had bottled up through their months of chasing finally manifested in the kiss when his lips met Willaim’s
In that moment, amidst the crashing waves, William leaned back into it, yielding completely as Sherlock deepened the kiss. They clung to one another, sharing a long, profound embrace that seemed to warp time itself. The water was deep and dark around them, yet the closeness they shared created a sense of warmth that defied the freezing temperature of the Thames. In that brief, beautiful heartbeat, the ruin of London and the agony of their pasts evaporated, replaced solely by the burning reality of each other.
Their brief moment of warmth vanished as the river turned violent. A powerful tidal bore, surged from upstream to swallow the twin fires along the banks, crested into a towering wave. William’s eyes widened as he saw the wall of water rushing up from behind Sherlock’s unsuspecting frame.
"Sherly, look out!!!" he cried out, his voice cracking with sudden, overwhelming terror for the man who had just saved him. Before Sherlock could even turn, the weight of the river slammed down upon them, shattering the air from their lungs and dragging them helplessly into the freezing depths.
Sherlock fought like hell to grab William and swim, but the terrifying new force of the water made it completely impossible. Sherlock’s frantic attempts to swim were instantly crushed by the massive wall of water. William tried to help his fingers scraping frantically against the slimy brickwork of the bridge pillars in a desperate hope of finding a handhold to pull them up.
The Thames refused to let go, dragging them back into the dark. The water kept taking them under. They were entirely at the mercy of the current. Sherlock managed one final, choking gasp before the drifting debris struck him, stealing his orientation and his consciousness then he went completely still.. William felt the detective’s limbs go slack.
“Noo.. not yet!!–” William’s thoughts, ignited by a final spark of adrenaline, blurred into sheer panic as Sherlock's body went limp in his arms and he had slipped into unconsciousness. William fought the undertow, trying desperately to pull Sherlock’s face above the surface, but the violent waves repeatedly slammed them downward.
Reversing their roles, William used the last of his fading strength to haul the detective’s dead weight upward, but the punishing waves kept driving them both under. Blinded by the water and losing his own senses, William thrust a trembling hand out into the dark void, praying to grab hold of anything that could save them.
Just as the darkness threatened to swallow him entirely, a hand cut through the torrent, grabbing William's outstretched fingers with an iron, unyielding grip. William saw deep navy cobalt blue eyes that glittered reflecting the waves and flames, the face was a blur in the adrenaline of the moment but William caught a glimpse of back hair with red tips.
William looked down at the strong, scarred hand anchoring them. A single, distinct scar cut across the stranger's wrist, tracing a pale line down toward the dorsal interosseous muscle of the hand. With a miraculous display of strength, the hooded figure hauled both William and the unconscious Sherlock completely out of the churning river.
As the cold air hit his face, William’s eyes finally closed, his body surrendering to complete exhaustion. He felt himself and Sherlock being gathered up into the stranger’s powerful arms, lifted together as if their combined weight were nothing. “Who is this?” William wondered as his consciousness dissolved. “To carry us both... they must be incredibly strong.…”
A harsh flash of light pierced the dark, stinging his eyes until they stirred and gently fluttered open. Sherlock found himself staring at an unfamiliar cream ceiling. The world beneath him felt unsteady, a low, rhythmic shaking that vibrated through his bones, accompanied by the lingering, distant drone of a sailing horn echoing in his ears.
A torrent of memories flooded his consciousness all at once: William standing at the precipice of the bridge, their desperate freefall, the paralyzing shock of the freezing water, and the sudden, violent impact that had knocked him out into the dark.
“Liam—” The name tore from his cracked, dry throat, a raw whisper of pure panic.
Sherlock threw himself upright, ignoring the agonizing protest of his muscles as he forced his aching limbs to move. His eyes scanned the small cabin, desperate and wild, until they landed on the adjacent bed.
William, laying unconscious on the next bed over. Sherlock crawled out of his bed, dragging himself across the floor despite the throbbing, blinding pain in his right shoulder. He had to reach him. Pulling himself closer, he saw William’s chest was heavily patched with medical dressings. Tracing above the cloth, a long scar ran across his shoulder, cutting from his collarbone straight to his scapula
The door clicked open, shattering the quiet. Sherlock immediately threw his weight over William, covering him protectively while leveling a fierce, lethal glare at the intruder.
"Whoa, chillax, mate!" the man held up his hands, completely unbothered as he stepped into the dim light with a relaxed stride.. "I’m just handling the medicine and smuggling you to the States. You can call me Billy."
"And why would you do that?" Sherlock demanded, his voice a low, dangerous rasp. "I see no rational reason for you to come to our aid."
Billy chuckled, shaking his head. "Tell me about it. But when that absolute demon boarded our ship and dumped you two in my lap, I didn't exactly have a choice. Look, let me be clear—I know I owe them my life and that they saved me back in the day, but the death threat was entirely uncalled for. They looked me dead in the eye with those terrifying, icy blue eyes and said, 'Save them, or else.'" He ran a thumb across his throat in a universal cutting motion. "I would've helped anyway! Yeah, I'm an ex-outlaw, but I'm clean now and working for USDJ. All that psychological intimidation wasn't needed, but hey, I guess they were just desperate to keep you two breathing. Quite the devil you have as a bodyguard. Or maybe a demon guardian angel."
Sherlock looked utterly perplexed as he started blankly at Billy. "That could not have been a more confusing double standard—"
Before he could finish, a weak but familiar laugh echoed in the room. Sherlock’s head whipped around— William was looking up at him, awake at last, a spark of genuine curiosity in his eyes. “Ah, I was wondering who it was that pulled us out of the river," William said softly, his brilliant gaze locking onto the detective. "They sound like quite the intriguing individual.” A faint, intrigued smile touching his lips.
The sheer relief of hearing his voice made Sherlock's shoulders drop, though he still managed an amused sigh. “It sounds more like we’ve stumbled into a fresh problem before even resolving our last one.”
Billy chuckled, tossing a bottle of medicine into his hand. "I doubt it. As dangerous and demonic as they seem, I doubt they have any intention of harming you."
Checking William's steady pulse, Sherlock let out a quiet breath and nodded. “It would appear that is the case.”
William sighed softly, his gaze locked entirely on Sherlock. “For now, I think our priority should be patching ourselves up and learning how to start over. America, is it? It sounds like quite the adventure. A faint, brilliant spark lit up his eyes as he tilted his head. “Well then, Mr. Holmes... are you up for a new mystery?
Sherlock grinned, the sheer warmth of William's gaze chasing away the lingering chill of the Thames. He held William’s hand, squeezing it gently. “Lead the way, Lord Moriarty.”