Paula Brunet-Sancho

Louis Roman is a secondhand goods broker in the Lyon region of France. He provides assistance to people and acts as a private investigator in cases involving suspected relatives or clients.

Because of his wavering health, Monsieur Henri can no longer live alone in his Paris appartment. Particularly grumpy, he ends up nonetheless accepting his son Paul's suggestion that he let one of his rooms out to a young female student. Far from falling for her charms, Henri uses her to orchestrate utter family chaos...