Three Parisian police officers are charged with driving a stranger back to the border. However, Virginie realizes their prisoner will most likely be killed upon return to his country and so goes about attempting to convince her fellow officers to release him.

A twist of fate leaves a hapless accountant romantically torn between two sisters.

Maxime and Mélanie are a typical teenage couple. Like most lovestruck fifteen-year-olds, they can’t get enough of each other and they think they’ll be together forever. But when Mélanie becomes pregnant, their worlds are rocked.

The plot follows detectives Karl Roebuck and Elise Wasserman working together to find a serial killer who left the upper-half body of a French politician and the lower-half of a British prostitute in the Channel Tunnel, at the midpoint between France and the UK. They later learn that the killer—who comes to be nicknamed the “Truth Terrorist”—is on a moral crusade to highlight many social problems, terrorising both countries in the process