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

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

1968 and 1969 in Paris: during and after the student and trade union revolt. François is 20, a poet, dodging military service. He takes to the barricades, but won't throw a Molotov cocktail at the police. He smokes opium and talks about revolution with his friend, Antoine, who has an inheritance and a flat where François can stay. François meets Lilie, a sculptor who works at a foundry to support herself. They fall in love. A year passes; François continues to write, talk, smoke, and be with Lilie. Opportunities come to Lilie: what will she and François do?