After being betrayed and nearly killed in Tangier, private security operative Sam Hunter recovers in a remote cottage. She soon returns to London to resume work for her employer, Byzantium, and determine which of her colleagues set her up. Her new assignment: posing as a tutor to the grandson of criminal multi-millionaire, Jack Turner.

Travelling undercover with the criminal multimillionaire she is spying on, Sam comes face-to-face with Bernard Faroux, the Frenchman she seduced and betrayed in Tangier. He offers to tell her who tried to assassinate her, but only if she gives vital information to him instead of Byzantium.