Riley is fourteen and lives in London at the end of the 19th century. He is an orphan, and was raised by a hired killer who decided to pass on to his student all the secrets of his dark craft... But Riley does not want to follow in the footsteps of his teacher! The boy dreams of escaping, and one day he is given the opportunity to slip away... into the 21st century. Chevron Sawano is seventeen, and she is the youngest, most ambitious and impulsive agent in the history of the FBI. Okay, almost an agent. The girl perceives her assignment to a secret facility in London as an exile, as an unnecessary and boring job... until she learns that she must monitor the time machine at the disposal of the FBI. Riley and Chevy must join forces - and save themselves and the world from the one who wills fate became the most dangerous criminal of all time... Or die, joining the list of his victims.