She had to wait for the blue cloud. The right moment to release the pheromone was when the yrr-cells were on the point of aggregation.

Those goddamn amoebas were about to get the shock of their lives.

Such an odd thought. Did amoebas feel shock?

She did a double-take. A change had taken place on the control panel. One of the display lights had gone out, telling her that the controls had been…

The controls!

She was no longer in charge of the submersible. The controls had been switched to the pilot. On the monitor a display screen appeared, showing a diagram of four torpedoes; two slim ones and two larger ones.

One of the heavyweight torpedoes lit up.

Li gasped in horror. She banged on the control panel, trying to regain the use of the instruments, but the command to launch the missile couldn't be reversed. The figures on the display reflected in her deep blue eyes, running backwards in an inexorable countdown:

00.03… 00.02… 00.01…

'No!'

00.00

Her face froze.

Torpedo

The torpedo that Johanson had launched left its tube and shot forwards. It got less than three metres through the water before it hit a steel wall and exploded.

An enormous pressure wave took hold of the Deepflight. It slammed backwards into the sluice. A fountain of water shot out. While it was still spinning through the water, the second torpedo launched. With a deafening bang the well deck exploded. The Deepflight, its two passengers and its deadly cargo went up in a ferocious ball of flames that consumed all evidence that they'd ever existed. Flying debris bored its way through the decks and bulkheads, piercing the ballast tanks at the stern, allowing water to gush in. Thousands of tonnes of seawater poured into the crater that had once been the basin.

The stern plunged.

The vessel was sinking at an incredible speed.

Exit

Anawak and Crowe had just reached the top of the ramp when the shockwave from the explosion shook the vessel. Anawak was flung through the air. He saw the smoke-wreathed walls of the tunnel spinning round him, then plummeted head first inside the black maw. Crowe tumbled through the air beside him, then disappeared. The ridged steel scraped his shoulders, back, chest and butt, tearing at his skin. He sat up, flipped over and was seized by another shockwave, which catapulted him so violently that he seemed to fly back into the hangar. There was an incredible din all around him, as though the whole ship had been blown to smithereens. Plummeting downwards, he curved through the air towards the water, and vanished beneath the surface.

He kicked out with his arms and legs, fighting the current, with no idea which way was up or down. Hadn't the Independence been sinking bow first? Why was the stern full of water?

The well deck had exploded.

Johanson!

Something smacked him in the face. An arm. He seized it, gripping it tightly as he pushed off with his feet. He didn't seem to be getting anywhere. He was thrown on to his side and pushed back, as the water tugged him in all directions. His lungs felt as though he were breathing liquid fire. He needed to cough and felt nausea rising as the watery rollercoaster plunged him down again.

Suddenly he surfaced.

Dim light.

Crowe bobbed up next to him. He was still gripping her arm. Eyes closed, she retched and spat, then her head disappeared below the surface. Anawak pulled her up. The water was foaming around them. He realised that they were at the bottom of the tunnel. In place of the lab and the well deck he was in a fearsome flood tide.

The water was rising, and it was bitterly cold. Icy water straight from the ocean. His neoprene wetsuit would protect him for a while, but Crowe didn't have one.

We're going to drown, he thought. Or freeze to death. Either way, it's over. We're trapped in the bowels of this nightmarish ship, and it's filling with water. We're going down with the Independence.

We're going to die.

I'm going to die.

He was overwhelmed with fear. He didn't want to die. He didn't want it all to be over. He loved life, and there was too much to catch up on. He couldn't die now. He didn't have time. This wasn't the moment.

Agonising fear.

He was dunked under water. Something had pushed itself over his head. It hadn't knocked him very hard, but it was heavy enough to force him under. Anawak kicked out and freed himself. Gasping, he surfaced and saw what had hit him. His heart leaped.

One of the Zodiacs had been swept up by the current. The pressure wave from the explosion must have wrenched it from its mooring on the well deck. It was drifting, spinning on the foaming water, as it climbed up through the tunnel. A perfectly good inflatable with an outboard motor and a cabin. It was built for eight, so it was certainly big enough for two, and it was filled with emergency equipment.

'Sam!' he shouted.

He couldn't see her. Just dark water. No, he thought. She was here just a second ago. 'Sam!'

The water was still rising. Half of the tunnel was already submerged. He stretched up, grabbed the Zodiac, pulled himself out of the water and looked around. Crowe had disappeared. 'No,' he howled. 'No, for Christ's sake, no!'

Crawling on all fours he dragged himself to the other side of the boat and looked down into the water.

There she was! She was drifting, eyes half closed, beside the boat. Water flowed over her face. Her hands paddled weakly. Anawak leaned out, grabbed her wrists and pulled.

'Sam!' he screamed.

Crowe's eyelids fluttered. Then she coughed, releasing a fountain of water. Anawak dug his feet against the side and pulled. 'The pain in his arms was so excruciating that he was sure he would let go, but he had to save her. Abandon her, and you may as well stay behind too, he thought.

Groaning and whimpering, he pulled and tugged until all of a sudden she was with him in the boat.

Anawak's legs folded.

His strength was gone.

Don't stop now, his inner voice told him. Sitting in a Zodiac won't get you anywhere. You've got to get out of the Independence before she pulls you into the depths.

The Zodiac was dancing on top of the rising column of water as it surged towards the hangar bay. There was only a short distance to go before they were swept on to the deck. Anawak stood up and fell down again. Fine, he thought. I'll crawl. On his hands and knees he went to the cabin and hauled himself up. He cast his eye over the instruments. They were distributed around the wheel in a pattern he knew from the Blue Shark. He could handle that.

They were shooting up the last few metres of the ramp now. Clinging, he waited until the time was right.

Suddenly they were out of the tunnel. The wave washed them into the hangar bay, which had started to fill with water.

Anawak tried to start the outboard motor.

Nothing.

Come on, he thought. Don't play around, you piece of shit. Start, goddamn it!

Still nothing.

Start, goddamn it!

All of a sudden the motor roared and the Zodiac sped away. Anawak closed his hands around the wheel. Speeding through the hangar, they veered around and shot towards the starboard elevator.

The gateway was shrinking before his eyes.

Its height was decreasing even as they raced towards it. It was unbelievable how quickly the deck was filling. Water streamed in from the sides in jagged grey waves. Within seconds the eight-metre-high gateway was just four metres high.

Less than four.

Three.

The outboard motor screamed.

Less than three. Now!

Like a cannonball they shot into the open. The roof of the cabin scraped against the top of the gateway, then the Zodiac flew along the crest of a wave, hovered momentarily in the air, and splashed down hard.