In a small Parisian building, a diverse group of people crosses paths, likes and observes each other, without always seeing each other.

Valentin, an 8-year-old boy living with his grandmother in late-1960s Buenos Aires, is surrounded by problems in his family he finds only himself capable of solving.

This sex comedy concerns the efforts of Julien to get his timid, "backward" 20-year-old son to take an interest in sex and get married. After a series of adventures with women (arranged by papa), Valentin finally gets married to a woman who appears to be as shy as he is. Things get complicated when his father begins an affair with her.