The thought filled her with relief, but it was an emotion that lasted barely seconds, because it relied on trusting Emma's kidnappers. What if they didn't release her? What if, God forbid, she was already dead? A spasm of sheer terror shot up her spine. If anything happened to Emma, she was finished. The thought of life without her was simply too much to bear.

Andrea reached into her handbag and pulled out a cigarette, lighting it with shaking hands. She took a long drag and tried Pat's number again, but there was still no answer. She left a second, curt message: 'Call me now. It's urgent.'

She leaned back against one of the kitchen's spotless worktops. This house had been Andrea's dream home when she bought it five years earlier for close to a million cash, which was most of the proceeds of the 40 per cent stake she'd sold to her current business partner. It had character, space, land, everything that had been missing in the tiny flat in which she'd grown up with her two sisters and mother. It was her and Emma's safe and private haven, where they could relax and spend time together. Yet tonight it felt alien, like a place she'd just stepped into for the very first time. Normally at this time there'd be noise: music playing in Emma's room; the tinny blare of the TV; the sounds of life. Tonight her home was dead, and she wondered whether it would ever feel the same again.

She went into the lounge and over to the drinks cabinet, avoiding turning on the lights. There were photos in here, of her and Emma – Emma as a toddler; her first day at school; at the beach. She didn't want to see them. Not now. She averted her eyes and poured herself a large brandy in the gloom, taking a big hit of it. It didn't make her feel any better, but at the moment nothing was going to.

With the drink in one hand and a succession of cigarettes in the other, she paced the darkening house, upstairs and down, walking fast but heading nowhere, eyes straight ahead so she didn't have to see any reminder of Emma. Thinking, worrying, trying to keep a lid on the terror and frustration that infected every ounce of her being. She wondered where they'd snatched Emma, and how. There were no signs of a struggle anywhere in the house, and besides, the alarm had been on when she came in.

But they have her, Andrea, said a voice in her head. That's the only thing that matters. They have her.

Half an hour passed. In that time she stopped walking only once, to refill her brandy tumbler, and to look out of the French windows and into the darkness beyond, wondering if even now there was someone out there watching her, checking her reactions. She drew the curtains and resumed her pacing. She knew now she wouldn't be able to sleep until Emma was safe, and in her arms. In the meantime, all she could do was pace the prison of her house alone.

Where was Pat?

An hour passed. She called him again. Still no answer. This time she didn't bother leaving a message.

She was getting a bad feeling about this. It wasn't like him not to answer his mobile. He carried it with him everywhere. It finally occurred to her that he might be at the Eagle, a pub he often liked to drink in on his evenings out. She didn't know the number, so she looked it up in the Yellow Pages and gave them a call.

A young woman with a foreign accent answered. In the background Andrea could hear the buzz of conversation, and immediately felt a pang of jealousy. Sounding as casual as possible, she asked if Pat Phelan was in tonight.

'I'll ask,' the girl replied. 'Hold on, please.'

Andrea waited, the phone clutched tight to her ear.

Thirty seconds later the girl came back on the line. 'I'm afraid no one has seen him for a long time,' she said politely.

Andrea's jaw tightened. Tonight was Tuesday. Pat had told her he'd been at the Eagle the previous Friday night, and last Wednesday.

'Is that everything?' asked the girl.

'Yes,' said Andrea quickly. 'Thank you.'

She hung up and stared at the phone. So Pat had been lying about his whereabouts. But why?

An unpleasant thought began to form in her mind. Could he possibly be involved in this? It was difficult to believe. After all, they'd been together nearly two and a half years, and although, if she was honest, she didn't entirely trust him, particularly where other women were concerned, he'd always got on all right with Emma. They hadn't been the best of friends, and Emma had certainly not welcomed his arrival into their close family unit, but she'd come round in the end. If anything, their relations had been improving in recent months. It was too much of a step to imagine him hurting her like this.

And yet… Pat was one of the only people in the world who knew she had cash reserves she could call upon without attracting too much attention. Near enough half a million pounds of cash reserves, in fact. Nor was he whiter than white. He'd admitted to her that years earlier, as a young man, he'd had a few scrapes with the law, and had even served a few months for receiving stolen goods. Receiving stolen goods was a long, long way from abduction, but even so, in her weakened state the thought preyed on Andrea's mind that the man who, for all his faults, she still loved might have betrayed her dramatically.

'Please don't let it be you,' she whispered, staring at the phone. Because she knew if that was the case, she'd be totally on her own.

Another hour passed, and as the clock ticked towards midnight with still no word from him, her doubts grew stronger. It crossed her mind more than once to call the police, but the people she was dealing with were ruthless, and clearly well organized, and they'd already told her what would happen to Emma if she did. Andrea didn't have much faith in the forces of law and order anyway. She'd had too much experience of them for that.

No, she needed someone she could trust. Someone who'd know what to do.

There was one person who could help. She might not have spoken to him for more than a decade but she was sure he would respond in this, her hour of need. The problem was, if she brought him back, she might also be unleashing forces outside her control.

But what choice did she really have? She couldn't do this alone.

There was a grandfather clock in the hallway, bought from an Islington antique dealer at an exorbitant price several years earlier, which had always looked out of place. Something about its relentless ticking tended to soothe her, though, and when it chimed midnight she stubbed out her latest cigarette in the ashtray and made her decision.

She retrieved a small black address book from her handbag on the kitchen top and found the number she wanted in the back, with no name next to it. She turned on the overhead light to dial, stopping at the last second. Thinking. They might have bugged the landline, and if they heard her… She couldn't risk it. Instead, she fed the digits into her mobile and stepped out into the back garden.

The night was silent as she walked to the pear trees at the end, thirty yards from the house, and stopped. She looked round, listening, remembering what the kidnapper had said: We're watching you. But they couldn't see her in the back of the garden, she was sure of it.

So, taking a deep breath, she pressed the call button on the mobile.

And took her situation to a whole new level.