After a wizard's spell goes awry, 12th-century Gallic knight Godefroy de Papincourt, Count of Montmirail finds himself transported to 1993, along with his dimwitted servant, Jacquouille la Fripouille. Startled and perplexed by modern technology, the duo run amok, destroying cars and causing chaos until they meet Beatrice de Montmirail, an aristocratic descendant of the nobleman, who may be able to help them get back to 1123.

Sandrine dreams of becoming a singer in Paris but for the time being she is only a salesgirl at Tati's and lives in a second rate hotel under the careful eye of Ahmed, the night watchman. One day, she meets Gérald, her brother's former boyfriend, who persuades her to move into his apartment. He soon takes control over Sandrine's life, organizing erotic rendezvous for her, taking her to her clients and waiting for her until she is through with her task.