LONDON. THE STANHOPE HOTEL, PARK LANE. 16.00 A normal afternoon. THE MANAGER.Newly engaged Elena Serenko has just made the life-changing decision to quit her job and start a new life in Australia. THE GUESTS. Upstairs, a young woman waits for her lover; a visiting family prepare for an evening out; and a sick man contemplates his own mortality. THE ASSASSIN. High up amongst the penthouse suites, a skilled and dangerous killer is hunting a quarry who’s eluded him for far too long. THE SIEGE. What none of them know is that a group of ruthless gunmen are about to burst into the Stanhope, shooting indiscriminately, and seizing hostages. As darkness falls and the gunmen become increasingly violent, only one thing matters. Who will survive?

ONE WITNESS. You're on a trip with your family, miles from anywhere. A shot rings out - and your whole life changes in an instant. ONE SECRET. A woman is racing towards you, chased by three gunmen. Although you don't know it, she harbours a deadly secret. She's in terrible danger. And now you are too. NO ESCAPE. You're running, terrified, desperate to find safety. You know that the men hunting you have killed before. And if they catch you, you'll be next ...

You have it all. Success, a beautiful home, a happy family. Until, in a heartbeat, it's gone. We've kidnapped your daughter, and we know everything about you. Including the dark secrets from your past you thought were forgotten. We tell you not to contact the police – and that we’ll know if you do. Because we can see you. And now you know this is no ordinary abduction. It’s worse. Within hours you’re on the run, with only one thought in your head: That you will stop at nothing to get your daughter back. Even murder...