Sam Capra is living the life of his dreams. A young American in London, he has a perfect flat, a perfect job with the CIA and a perfect wife, Lucy - who is seven months pregnant with their first child.

But one sunny day, it all goes up in flames. Sam receives a call from Lucy while he's at work. She tells him to leave the building immediately, which he does - just before it explodes, killing those inside. Lucy vanishes, and Sam wakes up in a prison cell.

Why did Lucy call him? Was she a loving spouse or an enemy operative? Is Sam's unborn child safe? Adrenaline coursing through his veins, Sam enters a frantic race to save his life and discover the truth about those he thought he knew so well...