He glanced away. ‘You’re going to get your memory back.’

‘But what about afterwards? If I remember, what next?’

He laid the book gently across the bed. ‘Let’s focus on this, OK?’

She looked at it. It was a book of dog breeds, filled with colour pictures. ‘What’s this for?’

‘You told me you thought you had a dog back home. Why don’t we see if we can find out what kind he is?’

‘Why?’

‘Because it might help jog other memories. That’s how the mind works, by unconscious association. One recalled detail can trigger another. So, if we can find your dog, we might remember his name. Then maybe some related incident will come back to you, like say a day at the beach. Before you know it, we might be able to start making all kinds of inroads into areas that are still blanked out. OK?’

‘OK,’ she whispered.

He started patiently flipping the pages, one by one. ‘Let’s see. Does he look like this?’ He pointed to a picture of a Labrador.

She frowned. ‘I don’t think he’s that big.’

‘OK, let’s look at some small dogs. Here’s one. King Charles spaniel. Does he look like this?’

She shook her head. ‘No.’

‘What about this one?’

‘I don’t think so.’

He flipped another page.

‘Stop,’ she said. ‘There.’

‘This one?’ He pointed. ‘West Highland White terrier.’

She recognised the picture. It was the small white dog from her cloudy memory. ‘That’s him. That’s my dog.’

‘Good.’ He smiled. ‘We’re making really good progress, Zoë.’

‘Can I go soon?’

‘Soon,’ he said.

‘How soon?’

‘I can’t say yet. It all depends on your recovery.’

‘What am I supposed to be remembering?’ she asked, her voice rising fast. ‘This isn’t therapy. I’m being held against my will. What’s so important that I’m being kept prisoner in this place?’

The doctor had no answer to that. ‘Let’s take this one step at a time, OK?’

When the session was over, he left her in her room. As the guard locked the door behind him, the doctor closed his eyes and sighed deeply.

You’re a doctor. You’re supposed to be helping people. This is all wrong. What the hell did you get mixed up in?

‘Jones wants to see you in his office,’ the guard informed him.

‘Later,’ the doctor said.

‘Jones says right now.’

The doctor sighed again. His shoulders drooped.

He got there three minutes later. Knocked on the door and walked in. The room was small and square. The walls were plain, the floor bare concrete. Jones’s desk was clear apart from a phone and a laptop. Jones was leaning back in his chair, smirking at him.

The doctor found it harder every day to hide his hatred of this man. He would have loved to smash that smirk off his face – but he knew what Jones would do to him. ‘What did you want to see me about?’

‘Got any good news for me?’ Jones demanded.

The doctor hesitated. ‘Not the news you want to hear, certainly.’

Jones grunted. ‘I didn’t think so. I wouldn’t say this so-called therapy of yours is getting us anywhere, would you?’

‘Yes, actually I would. Besides, it’s still early days.’

‘Maybe you don’t realise what’s going on here, Dr Greenberg. We’re on the clock with this.’

‘You can’t just click your fingers and make severe retrograde amnesia disappear overnight. Her GOAT results are improving steadily.’

‘What the hell is a goat?’ Jones snapped.

‘Galveston Orientation and Amnesia Test,’ the doctor said, trying to preserve his calm.

‘Don’t bullshit me with medical jargon. She’s lying.’

‘You saw the polygraph result.’

‘The lie detector isn’t reliable. You know that as well as I do.’

‘Listen to me,’ the doctor hissed. ‘We’re close. Really close. A few more days, a week. Maybe two, and it’s my guess that her memory will come back completely.’

Jones shook his head. ‘Why is it I get the feeling that you’re stalling me?’

‘I’m not stalling.’

‘Yes you are. You sympathise with the bitch. Buying her time. Let me tell you something. You’re not paid to sympathise. You’re paid to get results, and you ain’t getting them. I’ve given you all the leeway I’m prepared to give. We even redecorated the whole goddamn upper floor so we could move her to a nice little room, because you said the gentle approach would help. But I’ve had it with gentle.’

The doctor looked down at his feet and balled his fists at his sides. ‘So what are you suggesting we do?’

‘Apply more pressure. There are ways.’

‘What kind of pressure?’

Jones shrugged. ‘Whatever works. I don’t give a shit.’

‘You’re talking about torture.’

Jones shrugged again. ‘Like I said, whatever gets the job done.’

The doctor stared. ‘You’ve got to be kidding.’

Jones said nothing. His eyes were steady and cold.

‘You apply any kind of severe stress to her, and all you’ll do is drive the memories deeper,’ the doctor said. ‘She’ll regress dramatically. And I won’t have anything to do with torture. That isn’t what you hired me for.’

‘You’ll do what I tell you to do,’ Jones said. ‘And this is where we’re going to start.’ He grabbed a sheet of paper from his desk and brusquely handed it across.

The doctor scanned it quickly. There was just one name scrawled on the sheet. It was the name of a chemical. He looked up in alarm. ‘You can’t give that to her. You’re not authorised to use it. It’s experimental. And illegal.’

‘I can give anything I want to her,’ Jones said softly. ‘Now tell me. This shit goes a lot deeper than sodium pentothal, right?’

‘I’m not happy with this.’

‘Like I give a fuck. Answer the question.’

‘It’s designed to repress higher cortical functions and remove all inhibitions,’ the doctor muttered. ‘In theory, potentially, it’s the most powerful truth serum ever developed. But -’

‘That’s what I heard too.’

‘The only people who ever used this drug are terrorists and mass murderers,’ the doctor said. ‘This is America, not Sierra Leone.’

Jones just smiled, showing yellow teeth.

‘You’ve heard about the side effects?’

Jones didn’t answer.

‘Ninety-five-plus per cent chance of complete, irreversible psychosis. Those are the stories, and there are lab results on chimps to confirm it. That’s what you want to do to this girl? Fry her brain down to the size of a peanut so she has to spend the rest of her life in a mental hospital?’

Jones nodded slowly. ‘If I can get what I need from her first, yes.’

‘Just so you can get this information from her. You’re willing to make that trade?’

‘Absolutely. This matters a great deal to the people I work for.’

‘Then you can find someone else to help you. I won’t be party to this.’

‘Think you have a choice, Greenberg?’

‘I don’t answer to you.’ The doctor turned to go. But the metallic sound of the gun being cocked behind him stopped him in his tracks. He turned back to face Jones.

The man was aiming a pistol right at his head. In his other hand he was holding a phone. ‘You’re going to make a call, doc. You’re going to get me some of that serum. And then you’re going to administer it to our little patient in there, and we’ll see who’s right.’

The doctor hung his head. He was powerless here. They had him. ‘All right. I have a contact. But I can’t just write out a prescription for this stuff. It might take a few days.’

‘Too slow,’ Jones said. ‘My employer isn’t a patient man.’ He checked his watch. ‘You get it for me by tonight.’

‘Tonight!’

‘Fail me, and you’ll watch me torture the girl before I put a bullet in your eye,’ Jones said. ‘Your choice.’