When former soldier Dan Tyler wakes up in a strange room on a bed covered in blood, with no idea how he got there, he thinks he's stepped into someone else's nightmare. But he's wrong. This is reality. The corpse beside him is Leah, a girl he's met recently. And it gets worse... As he staggers from the bed the phone rings, and a voice tells him to press play on the room's DVD machine. The film shows Tyler killing Leah. Then he's told to go to an address in East London where he's to deliver a briefcase and await further instructions. There's no way out. The evidence against him looks rock-solid. Tyler's heading into terrible danger. If he's to survive the next twelve hours, he must find out who really murdered Leah - and why...