Riley is fourteen and lives in late 19th century London. He is an orphan, and raised his hired killer, who decided to convey to the student all the secrets of his gloomy craft... But Riley doesn't want to follow in the teacher's footsteps! The boy dreams of escaping, and one day he is given the opportunity to slip away... into the 21st century. Chevron Savano is seventeen, and she is the youngest, most ambitious and impulsive agent in FBI history. Okay, almost an agent. The girl perceives her appointment to a secret facility in London as a link, as an unnecessary and boring job... until he finds out that he must monitor the time machine at the disposal of the FBI.