The guard’s grip on Kiara’s arm tightened, his fingers digging into her skin like metal clamps. "Get this street kid out of here," he barked, pulling her backward. "She’s disrupting Mr. Alliance’s schedule."

Three days later.

The Red Sea was a brilliant, blinding blue under the scorching Egyptian sun.

The motor yacht Anubis sliced through the water, leaving a long, white wake behind it. Hurghada was forty miles behind them. Ahead lay the coordinates of the sunken Soviet vessel, The Dmitry Donskoy.

Kiara stood at the railing of the yacht, staring down into the deep water. She was wearing a black wetsuit, her curly hair braided tight against her head. Her face was completely changed. The innocence of the twelve-year-old girl from the slums of São Paulo was gone, replaced by a cold, sharp focus.

She held the silver key in her right hand. Around her neck hung a small vial containing a sample of her own blood, drawn by Marco's medical team on the plane.

Marco walked up beside her, wearing his own diving gear. "The sonar shows the wreck is at eighty meters. It’s a deep dive, but we have specialized mixed-gas rebreathers. We have twenty minutes of bottom time before we have to begin decompression."

"I'm ready," Kiara said. Her voice was flat, devoid of emotion.

"Are you sure about this, Kiara?" Marco asked gently. "Once we go down there, there’s no turning back. If we destroy the lock mechanism, the chemical weapon will be trapped forever under two hundred tons of steel. But if we fail, Viktor will find a way to blow it open anyway."

"We won't fail," Kiara said. "For my grandmother."

They fitted their masks and took their mouthpieces. With a backward roll, they plunged into the warm, crystalline water of the Red Sea.

The descent was a journey into another world. The light faded from brilliant blue to a deep, dark indigo. Schools of colorful reef fish gave way to the silent, eerie shadows of the deep ocean.

At sixty meters, the massive, rusted silhouette of The Dmitry Donskoy appeared, lying on its side on a sandy slope. The hull was covered in coral and anemones, looking like a sleeping prehistoric monster.

Marco pointed toward the stern.

They swam through a massive tear in the steel hull, entering the dark, silent interior of the ship. Their dive lights illuminated rusted pipes, floating debris, and the eerie remnants of crew quarters.

They reached the lower hold.

There, secured to the bulkhead, was a massive, circular steel door—the hydraulic lock. In the center was a keyhole shaped exactly like the silver key, surrounded by a complex array of ancient, copper-wiring sensors.

Marco swam to the door and nodded to Kiara.

Kiara stepped forward, holding the key. She inserted it into the lock. It fit perfectly.

She then took the small syringe she had brought down and injected her blood into a small, porous receptor pad beside the keyhole.

For a long, agonizing moment, nothing happened.

Then, a low, mechanical hum echoed through the metal hull. A series of ancient green LED lights, powered by a long-life battery system designed forty years ago, flickered to life.

Click. Click. Click.

The heavy locking bolts began to retract.

Suddenly, a bright dive light illuminated the room from behind them.

Kiara turned, her heart stopping.

Two divers in black military gear swam into the hold. Behind them was Viktor, wearing a state-of-the-art full-face diving mask. He was holding a high-pressure underwater spear gun, aimed directly at Marco’s chest.

Through his mask, Viktor’s eyes crinkled into a triumphant smile. He pointed to the open steel door, then made a gesture for them to step back.