One

They spent ten minutes trying to crack the porthole, but the glass wasn't even scratching. There was no swearing; they had both known what the result would be. Stopper tossed the bed into the corner of the chamber; the echo of its collision rang dully. Panic unstitched itself once more in Jane's gut. He wanted to breathe fresh air. He didn't want the stink of cheap whisky fumes and stomach acid to be the last odours to sit in his lungs. And though Stopper was suddenly the only thing between him and being alone, he wished him a thousand miles away. He didn't know what was going to happen once the goodwill and the fire from the whisky were all gone and it became just the two of them and the panic stripping them away, layer by layer, to a point where violence was waiting.

They were painstakingly checking the seals at the hatch on the far side of the chamber, in the hope that the explosive decompression Carver and Rae had suffered might have somehow weakened it, when there was a deep sound they both recognised: the chunk of the hatch tumblers sliding free. They stumbled over each other in their desire to be first out of the door, and Stopper's fist was balled, ready to fight Jane for it, when Jane put out a hand to hold him back.

'Wait,' he said, and held up his other hand in a placatory gesture. 'Stopper, let's just take it slow. We don't know what it was did for the guys out there. If it was a gas leak, maybe.'

'There's nothing on the platform that could take out a whole shift.'

'But something did, right? Something did.'

Stopper sighed and let the tension fall out of him; he seemed to dwindle. 'OK. I just . . . if that's the fail-safe, I just don't want it to unfail-safe itself. You hear me?'

'I hear you. But let's at least get some masks on. The suits too. You didn't see . . . their skin, Stop, their skin was sliding off them.'

They shrugged on their wetsuits and masks, gloves and boots. They checked each other's oxygen tanks and gave each other the OK signal. At the hatch, Jane pulled out his regulator and said, 'Stop, try not to look at what's out there too much. Let's head for the OIM's office and see what's what. Quick as we can.'

He didn't hang around to see if Stopper was following, but took off quickly and almost paid the price for his impatience. The wind on deck was gusting so violently that it swept his feet from under him and took him fully twenty feet towards the guard rails. Part of them had been sheared off either directly by the wind or some piece of hardware driven by it. The rubber suit bit at the deck and brought him to a stop six feet away from his death. He was almost too busy looking at the sky, at the chicanery of violet and green and orange, to notice. Northern Lights, he supposed. This far south? He thought it more likely that it was the breakdown of cells in his own brain as he lay dying. But he wasn't dying. Not yet.

Stopper had tiptoed down to him, hand-over-hand on the guard rail, and helped him upright. Together they shouldered into the wind, angling towards the block that contained the Offshore Installation Manager's office. Bodies were piled up at the threshold of the door. He could feel the panic creeping through him like cold. He felt he must keep moving or it would consume him. Jane led the way inside, hoping that Stopper would give the dead as short shrift as he had. There were more bodies ranged across the corridors and internal stairs. In a canteen, one man sat hunched over a half-eaten sandwich, his cheeks ballooning, his stomach hanging like a Portuguese man-o'-war from his lips.

Jane could hear his breathing quicken through the regulator. He tried to calm himself by thinking how ridiculous he must look in his diving gear. Some of the toolpushers and roustabouts would pull a muscle if they could see him and Stopper now. Gas leak, he was thinking. Cyanide? Hydrogen sulphide? Could that change the colour of the sky?

He slowed as he neared the OIM's office. The control room next to it was utterly still and dark; the windows were packed black with debris. Ricky Melling, the Dynamic Positioning Operator, was slumped over a desk, a welter of his blood dried to glaze like a slab of treacle toffee waiting for the hammer. The swelling of his body had split his jacket up the back seam, the jacket he'd described once as a bit roomy since he'd come off the sauce and started grilling his chicken and chops.