Stéphane Petitbourgeois is having trouble with his son-in-law Hubert, who has an extra child every year and is expecting his ninth, making thirteen people in the same apartment. However, a competition promises twenty million to the youngest grandfather of twelve grandchildren. Stéphane begins to encourage Hubert. But Pat became sterile from that day on. Finally, after two years, a child is announced. In fact, triplets were born, and after a few twists and turns, Stéphane became the youngest grandfather of twelve grandchildren.

Mario, a bumptious sheep-shearer, discovers he has a inimtable touch that makes women, as well as sheep, swoon at his professional caress. He is soon the most sought-after hairdresser in France and is awarded the Legion of Honor...