The Tunisian born hero of the film decides to break with his disorganized yet habit-ridden life in Paris, and sets off to discover his homeland, which he left at 6 years old, and to rekindle the memory of his mother, who died when he was a child.
In a frightening dream, Pauline, daughter of Felix the Roman governor, foresees the death of Polyeucte and cannot agree to let her husband leave the Palace. In love, Polyeucte leaves however on the advice of his Christian friend Néarque who encourages him to neglect the tears of his wife and urges him to be baptized...
Casti and Trébois, two friends who are workers at the same factory, have developed a common passion for flying. They dream of starting an aviation club. In the meantime they spend all their Sundays restoring an old plane under the supervision of Raf, a former RAF pilot...
The children born from a first marriage of a widower and a widower who have remarried do not get along. Frequent quarrels break out in the household which finally finds calm thanks to the presence of a new little girl.