Jacques Mesrine, a loyal son and dedicated soldier, is back home and living with his parents after serving in the Algerian War. Soon he is seduced by the neon glamour of sixties Paris and the easy money it presents. Mentored by Guido, Mesrine turns his back on middle class law-abiding and soon moves swiftly up the criminal ladder.

Chloé, a fragile young woman, falls in love with her psychoanalyst, Paul. A few months later she moves in with him, but soon discovers that her lover is concealing a part of his identity.

The successful novelist Judith Ralitzer is interrogated in the police station about the disappearance of her ghost-writer. A serial-killer escapes from a prison in Paris. A missing school teacher leaves his wife and children. In the road, the annoying and stressed hairdresser Hughette is left in a gas station by her fiancé Paul while driving to the poor farm of her family in the country. A mysterious man offers a ride to her and she invites him to assume the identity of Paul during 24 hours to not disappoint her mother. Who might be the unknown man and what is real and what is fiction?