He emerged into the fine Manhattan morning and checked his bearings on the map the hotel concierge had given him last night. Then he looked at his watch: 8.10 a.m. From past experience of navigating New York office buildings, he reckoned he should allow himself a good fifteen minutes to get to Donald’s office once he reached the man’s building. And it was a good five minutes’ walk from here, the concierge had told him – and that was assuming he did not get lost.

Passing a sign informing him he was now on Wall Street, he walked past a Jamba Juice shop on his right and a shop offering ‘Expert Tailoring and Alteration’, then entered the packed Downtown Deli.

The place smelled of stewed coffee and frying eggs. He sat on a red leather bar stool and ordered freshly squeezed orange juice, a latte, scrambled eggs with a side order of bacon and wheat toast. As he waited for his food, he flipped through the business plan once more, then, looking at his watch again, mentally calculated the time difference between New York and Brighton.

England was five hours ahead. Lorraine would be having lunch. He gave her a quick call on her mobile, told her he loved her. She wished him luck in the meeting. Women were easy to please, just a bit of lovey-dovey flannel every now and then, the occasional lines of poetry, and one or two pieces of expensive-looking jewellery – but not too often.

Twenty minutes later, as he was paying the bill, he heard a massive bang somewhere in the distance. A guy on the stool next to him said, ‘Jesus, what the fuck was that?’

Ronnie collected his change and left a decent tip, then stepped out into the street to continue his journey towards Donald Hat-cook’s office, which, according to the information that had been emailed to him, was on the eighty-seventh floor of the South Tower of the World Trade Center.

It was 8.47 a.m. on the morning of Tuesday, September 11th, 2001.

Abby Dawson had chosen this flat because it felt secure. At least, in as much as she was ever going to feel secure anywhere at this moment.

Apart from the fire escape at the back, which could only be opened from inside, and a basement fire exit, there was just one entrance. It was eight floors directly below her, and the windows gave her a clear view up and down the street.

Inside, she had turned the flat into a fortress. Reinforced hinges, steel plating, three sets of deadlocks on the front door and on the fire escape door at the back of the tiny utility room, and a double safety chain. Any burglar trying to break in here was going to go home empty-handed. Unless they were driving a tank, no one was going to get in unless she invited them.

But just in case, as back-up, she had a canister of Mace pepper spray in easy reach, a hunting knife and a baseball bat.

It was ironic, she thought, that the first time in her life she was able to afford a home large and luxurious enough to entertain guests, she had to live here on her own, in secrecy.

And there was so much to enjoy here. The oak flooring, the huge cream sofas with their white and chocolate-brown cushions, the sharp, modern art on the walls, the home-cinema system, the high-tech kitchen, the massive, deliciously comfortable beds, the under-floor heating in the bathroom and the smart guest shower room which she had not yet used – at least not for what it was intended.

It was like living in one of the designer pads she used to covet on the pages of glossy magazines. On fine days, the afternoon sun streamed in, and on blustery days, like today, when she opened a window she could taste the salt on the air and hear the cries of gulls. Just a couple of hundred yards beyond the end of the street, and the junction with Kemp Town’s busy Marine Parade, was the beach. She could walk along it for miles to the west and along under the cliffs to the east, past the Marina.

She liked the neighbourhood too. Small shops close by, safer than going into a large supermarket, because she could always check who was in there first. All it needed was for one person to recognize her.

Just one.

The only negative was the lift. Extremely claustrophobic at the best of times, and more prone than ever to panic attacks recently, Abby never liked to ride in any lift alone unless she absolutely had to. And the jerky capsule the size of a vertical two-seater coffin that serviced her flat, and had got stuck a couple of times in the last month – fortunately with someone else in it – was one of the worst she had ever experienced.

So normally, up until the past couple of weeks, when workmen renovating the flat below hers had turned the staircase into an obstacle course, she walked up and down. It was good exercise and, if she had some heavy shopping bags – well, that was easy – she would send them up in the lift on their own and climb the stairs. On the very rare occasions she encountered one of her neighbours, then she would ride up shoulder to shoulder with them. But mostly they were so old they never went out much. Some seemed as old as this mansion block itself.

The few younger residents, like Hassan, the smiling Iranian banker who lived two floors below her and sometimes threw all-night parties – the invites to which she always politely declined – seemed to be away, somewhere else, most of the time. And at weekends, unless Hassan was in residence, this whole west wing of the block was so silent it seemed to be inhabited only by ghosts.

In a way, she was a ghost too, she knew. Only leaving the safety of her lair after dark, her once long, blonde hair cropped short and dyed black, sunglasses on her face, jacket collar turned up, a stranger in this city where she had been born and grown up, where she had been a business studies student and had once worked bars, done temporary secretarial jobs, had boyfriends and, before the travel bug hit her, had even fantasized she would raise a family.

Now she was back. In hiding. A stranger in her own life. Desperate not to be recognized by anyone. Turning her face away on the rare occasions when she passed someone she knew. Or saw an old friend in a bar and immediately had to leave. God damn it, she was lonely!

And scared.

Not even her own mother knew she was back in England.

Just turned twenty-seven three days ago – and that was some birthday party, she thought ironically. Getting smashed up here on her own, with a bottle of Moët et Chandon, an erotic movie on Sky and a vibrator with a dead battery.

She used to pride herself on her natural good looks. Brimful of confidence, she could go out to any bar, any disco, any party and have the pick of the crop. She was good at chatting, good at laying on the charm, good at playing vulnerable, which long ago she had understood was what guys liked. But now she was vulnerable for real, and she was really not enjoying that.

Not enjoying being a fugitive.

Even though it would not be for ever.

The shelves, tables and floors of the flat were piled high with books, CDs and DVDs, ordered from Amazon and from Play.com. During the past two months on the run she had read more books, seen more films and watched more television than ever before in her life. She occupied much of the rest of her time by doing an online course in Spanish.

She had come back because she thought she would be safe here. Dave had agreed. That this was the one place he would not dare show his face. The only place on the planet. But she could not be completely sure.

She had another reason for coming to Brighton – a big part of her agenda. Her mother’s condition was getting slowly worse and she needed to find her a well-run private nursing home where she could have some quality of life in the years remaining. Abby did not want to see her end up in one of those terrible National Health Service geriatric wards. She had already identified a beautiful home in the countryside nearby. It was expensive, but she could afford to keep her mother there for years now. All she had to do was lie low for just a little longer.