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.
Monsieur Cinema, a hundred years old, lives alone in a large villa. His memories fade away, so he engages a young woman to tell him stories about all the movies ever made.
The evil knight Torchesac, who is at the service of the sinister lord of La Mortaille, gets a very powerful magic flute and uses it for evil purposes. Johan and Pirlouit, assisted by the magician Homnibus, travel to the land of the Smurfs, the only manufacturers of this sort of instrument, to get a new one and battle the usurpers.
Alain and Marie moved to the suburb house of their dreams. But the real estate agent warned them: what is in the basement may well change their lives forever.