Coldbrook

Satpal.

‘You can’t open that door!’ Holly shouted. ‘It’s a disease, something, and you can’t!’

Satpal glanced back at her, and the guard paused behind a bank of desks to look as well. He was terribly young, perhaps no more than twenty, and his fear was that of a child. Of course, he’s seen stuff that shouldn’t be, and that’s just the reason why Satpal must not open-

She heard the hiss as the door’s hydraulics engaged. Satpal took one last look back at her and then left Control, and the last that Holly saw of him was as he ran past the glass-block wall. They can get out now, she thought. She looked up at one of the cameras mounted high on the ceiling and wondered how many people were watching this. Jonah, almost certainly. Some of the others.

Vic? Maybe.

The guard tripped as he ran for the door. Alex and the other guard, changed now, were going for him, scrambling across desktops and leaping the spaces in between, both of them emitting that strange hooting sound.

The alarm ceased, and in the sudden silence everything that Holly could hear was terrible.

Melinda was advancing on her, dragging one leg because Alex’s bullets had shattered her hip.

Oh sweet Jesus, Holly thought, because she suddenly knew what she had to do. She looked up at the camera again and drew her hand across her throat, hoping that whoever was watching would understand. And she hoped also that they would have the courage to do what needed to be done. Satpal had betrayed himself. It was understandable, but it didn’t make things any easier. If it weren’t for him. . she thought. If it weren’t for him, they could have sealed Control and gone about closing down the breach remotely from Secondary.

But now that Satpal had somehow managed to open the door — through sabotage, or prior agreement with some of the maintenance engineers working here — they were all finished.

Unless.

Holly closed her eyes and breathed deeply, wondering if she could really-

The young guard screamed, the sound suddenly becoming muffled as he slipped through the doors and out into the corridor. She looked just in time to see Alex grab him, press him against the glass wall and bite into his throat.

Oh God, don’t let me go like that, not like that, not eaten.

Melinda was close now, and the other guard also came for Holly, taking away any chance she might have had to consider more fully the threat she faced. In that instant her survival instinct took over. Instinct, and her scientist’s mind, because fascination still bubbled below the surface.

She slapped her hand on the eradicator power button on her desk and sprinted for the breach. As Holly ran she had time to think, What will it be like, walking in another Earth?

Then she entered the space between.

7

Secondary was on Coldbrook’s level one, the highest level, still well over a hundred feet below ground. Jonah had rushed along corridors and climbed stairs from level three in Control. And he was almost an old man. Sometimes he forgot that, but not today.

He arrived just as three other people reached Secondary. He was sweating, gasping, and clamping a hand to his chest. He didn’t know the guard’s name, but the other two arrivals were Uri, their communications technician, and Estelle, the brilliant anthropologist from France. He nodded at them, and once inside Secondary the guard closed the door. As it clicked shut Jonah glanced through the reinforced viewing glass at the empty corridor beyond, his breath misting the window.

‘What’s happening?’ Uri asked. He’d obviously been asleep and was still shaken at being woken by the alarm.

‘Kill the alarm first,’ Jonah said. ‘Then wind up the cameras.’

Secondary was a much-compacted version of Control, with one long desk holding an array of computer monitors, keyboards, switches and levers, and four large screens on the facing wall through which could be accessed any remote-viewing camera in Coldbrook. The rear wall was home to a schematic of the facility. It showed the circular central core, a hundred feet across and rising the full depth of Coldbrook, and the three main levels that were set around the core. There were digital indicators at doorways, change of levels and access points to the surface, and it worked as a security map, as well as an indicator of system functionality. Right now it was unlit. Also along the back wall were two rows of chairs. At present they were folded and stacked, and Jonah nodded at them and looked at the guard.

‘Can you-?’

‘Sure.’ The young guard went about opening the chairs, and Jonah took some small comfort from the sub- machine gun slung across his shoulder. There would, with luck, be others here soon, and they’d all need somewhere to sit.

Estelle switched off the alarm, and Jonah sighed in relief.

‘Please keep an eye on the door when you’ve done that,’ he said to the guard. ‘Don’t let anyone in if they don’t seem. .’

‘Don’t seem what?’ the guard said, still placing chairs.

‘Just. . normal.’ Uri and Estelle were both looking at Jonah, and he pulled across a chair and sat between them. He was still shaking and breathless from rushing here. The alarm had chased him all the way, and the fear of what was happening, and the certainty that he was to blame. There are safeguards, he’d used to think whenever anyone expressed doubts about what they were doing. But safeguards were only as effective as the minds that created them.

‘What’s happened, Jonah?’ Estelle asked.

‘Something came through the breach. Holly called me. By the time I got there the alarm was sounding and Control was locked down.’ There was so much more to say, but he didn’t know where to begin.

‘What something? What about the eradicator?’

‘A person. And it didn’t work.’

‘So. .?’ Estelle asked, her professional interest piqued. Jonah glanced at her. They’d known each other for ten years, and she knew without him saying anything that there was worse to come. But her eyes were wide with excitement. He’d been aware of her growing disappointment that there were no obvious signs of human habitation or influence beyond the breach, and now. .

‘I think it was a man,’ he said. ‘And he killed Melinda. And then Melinda bit Alex Maxwell on the face.’

‘She. .?’ Uri said. ‘You said it killed her.’

‘Melinda?’ Estelle gasped. They had been good friends.

‘I ran,’ Jonah said, remembering the last terrible thing he had seen as he’d torn himself away from the glass wall. Part of him had wanted to stay, hoping that the situation would be resolved and that things would be safe again. But he had already been locked out of Control, and Secondary was the only place for him to go. And even if they did manage to restore calm to the chaotic situation, everything had gone too far. He was aware of the selfishness of his thought, now as he had been then, but he couldn’t help it. This place was his life. From the glimpse he’d had down at the breach, it was close to ending.

‘But what do you mean-’ and then the three of them were talking at once.

‘Can we have some order, please!’ Jonah said coldly. ‘Bring up Control on screens one to three, and the corridor outside the main doors on four.’ He glanced at the guard. ‘Anyone else coming?’

‘No,’ he said. ‘I thought I heard a scream.’ Jonah had often wondered how many of the ex-military guards they employed had killed. He’d never really wanted to know, but now he did. The guard’s face was pale, but he was not panicking. Not yet.

‘A scream?’ Uri whispered.

‘Oh my God!’ Estelle gasped, because the screens had flickered into life. And it was worse than Jonah could