Read Chapter 26: The Fourth Fragment

The water in the reservoir was dead black and cold enough to ache through the soles of Mack’s boots. He stood on a narrow iron catwalk that hadn’t been maintained since the city stopped caring about this place—somewhere beneath the old Croton system, Eleanor had said, a forgotten branch that fed nothing but ghosts now. The air smelled of rust and mineral and something older, something that made the back of his neck prickle.

Elena moved beside him, her flashlight beam cutting a lazy arc across the still surface. “She said it would be at the convergence point. Where the old pipe meets the new.”

“She said a lot of things.” Mack’s voice was low, tight. He hadn’t trusted Eleanor Voss yet. Maybe he never would. But she’d drawn a map in the dust of her cell while the Warden’s guards prowled the corridors above, and the map had matched Langer’s grandfather’s schematics almost perfectly. Almost.

“She knew your father,” Elena said. It wasn’t a question.

Mack didn’t answer. His father had died when Mack was twelve, crushed in a tunnel collapse that the official report called a freak accident. Mack had believed that for fifteen years. Now he didn’t know what to believe. The Key fragments hummed faintly in the pouch at his belt—two of them, the third lost to the Warden, the fourth supposedly ten feet below the waterline.

“There.” Elena’s beam stopped on a circular grate set into the reservoir’s far wall, half-submerged, crusted with lime and sediment. A faint blue glow bled through the slats, pulsing slow as a heartbeat.

Mack’s chest tightened. The fragments in the pouch vibrated harder, like dogs straining on a leash.

“That’s it.” He started along the catwalk, but Elena caught his arm.

“Wait. Something’s wrong.”

He followed her gaze. The water was too still. Not a ripple, not a shift—even a dead reservoir should show *something* from their movement. The surface sat like polished glass, unnatural, waiting.

“The Warden’s shadows don’t move through water,” Mack said, more to himself than to her.

“No. But his spies do.”

Footsteps echoed behind them, unhurried, deliberate. Mack spun, hand going to the pry bar he’d liberated from a maintenance locker two tunnels back. A figure emerged from the darkness at the catwalk’s far end—lean, familiar, wearing the same olive jacket Mack had seen a hundred times in the Gatekeepers’ safehouse.

Jax.

“You’re a hard man to follow, Riley.” Jax smiled, but it didn’t reach his eyes. He walked forward with an easy stride, hands open at his sides. “Salazar sent me to make sure you didn’t do anything stupid.”

“Salazar sent you to babysit, or to steal?” Mack didn’t move. Elena shifted beside him, her hand dropping to the knife at her hip.

Jax’s smile flickered. “Now that’s hurtful. I’ve been with the Gatekeepers for six years. I bled for that cause.”

“You’ve been with the Gatekeepers,” Mack said slowly, “or the Warden?”

The smile died. Jax’s hand went to his belt, and when it came back it held a compact dart pistol—the kind that fired shadow-tipped rounds, the kind that had nearly taken Elena’s head off three weeks ago. Mack had seen one before, in the hands of the assassin who’d killed Langer. The same gun had probably been there that night in the tunnel, wearing a different face.

“The Warden pays better,” Jax said, “and he’s been alive for two hundred years. You think the Gatekeepers are going to last that long? Salazar’s a zealot with a dying cause. The Warden is *forever*.”

“He’s a monster,” Elena spat.

“He’s *practical*.” Jax raised the pistol, aiming at Mack’s chest. “Now, I’ll take those fragments, and I’ll let you walk out of here. Maybe. Elliot’s waiting above with your friend Salazar—the Warden has him, by the way. Wants to make a trade.”

Mack’s blood went cold. “Salazar’s captured.”

“Last night. Walked right into a trap the Warden set with your name on it.” Jax’s grin returned, uglier now. “He’s not dead yet. But he will be, unless I come back with your pieces and a message that you’re willing to deal.”

Mack’s mind raced. Salazar had been the only link to the Gatekeepers’ broader network—the safehouses, the resources, the knowledge of the Key’s purpose. If the Warden had him, that leverage was gone or corrupted. And Jax had just confirmed the Warden now had all three fragments, plus a hostage, plus the upper hand.

Except for one thing. Jax didn’t know about the fourth fragment yet. Mack glanced at the grate behind them, the blue pulse still steady beneath the water. If he could reach it—if he could get all four pieces together, he might have enough leverage to force a trade on his own terms.

“You’re not walking out of here with anything,” Mack said. He shifted his weight, positioning himself between Jax and the grate. “Elena, when I say go, drop.”

“Drop where?”

“Water.”

Jax laughed. “You’re going to swim? With a dart in your spine? The shadows in this place are thick enough to taste, Riley. You can’t—”

Mack moved. Not toward Jax—toward the rusted valve wheel at the catwalk’s edge, a massive iron circle that hadn’t turned in decades. He threw his weight against it, shoulder screaming, and the wheel gave with a shriek of tortured metal. A floodgate somewhere below groaned, and the dead-still water suddenly churned, surging upward in a violent swell.

Jax’s eyes went wide. He fired—the dart whistled past Mack’s ear, close enough to kiss skin—but the rising water pitched the catwalk under his feet. He staggered, grabbed for the railing, missed.

Mack lunged forward, not for Jax but for the grate. The water was rising fast, already up to his knees, surging through the rusted screens with the force of a century of pent-up pressure. He dove into the cold, eyes open, and saw the fourth fragment—a shard of pale stone no bigger than his thumb, glowing from a cradle of ancient brass at the convergence point.

His fingers closed around it.

Behind him, Jax screamed. The water had knocked him off the catwalk entirely, dragging him toward a gap in the reservoir wall—a chasm that had probably been a maintenance shaft before something collapsed it. He was flailing, clawing at the slick concrete, but the current was merciless. Mack surfaced, gasping, and watched Jax disappear into the black opening with a final, gurgling cry.

The water stilled almost immediately, settling back to its earlier calm as the pressure equalized. Mack swam to the catwalk, hauled himself up, and found Elena waiting, soaked and shivering, her knife still in her hand.

“That,” she said, breathing hard, “was the most insane thing I’ve ever seen.”

“It worked.” Mack opened his palm. The fourth fragment pulsed there, warm against his cold skin, and the two in his pouch sang in response. Three pieces in hand. Four in total, if he could get the third back from the Warden. “We have them. All of them, together.”

Elena’s face didn’t relax. “Jax said the Warden has Salazar. If we have all four fragments physically here, and the Warden only has the one he took from you, then he’s losing his leverage unless he gets Salazar to talk.”

“Salazar won’t talk.” But even as Mack said it, doubt crept in. Salazar had his own agenda—that had been clear since the second fragment vanished. Was it possible Salazar had *let* himself be captured? That this was part of some deeper play?

“Mack.” Elena’s voice was sharp. “Look.”

She pointed at the water. The glow from the grate had dimmed, but now something else was rising to the surface—a scrap of paper, still dry, sealed in a thin waterproof casing. Mack fished it out, hands trembling from cold and adrenaline. He cracked the seal and unfolded it.

The handwriting was careful, antique, unmistakably the Warden’s.

*Child of Riley. You have what I need. Bring the four pieces to the Collecting Point—the old South Ferry station, where your father first learned the truth. Come alone, or Salazar dies. Come armed, or Salazar dies. I will be waiting.*

Elena read over his shoulder and went very still. “There’s more.”

She pointed to the bottom of the note, where a postscript was scrawled in darker ink, an afterthought:

*And tell your friend that her brother was not an accident. He was a message. I sent it fifteen years ago, and she never received it.*

Mack watched the color drain from Elena’s face, watched her hand tighten around the note until her knuckles went white. The fourth fragment pulsed in his grip, warm and heavy, suddenly feeling less like hope and more like a noose.