Mom and dad were brought up in an orphanage. Now they are 50 years old, and a great desire for life does not leave them to this day. This is a love story of mother and father, through which the director could actually see his parents.

After seventeen years of living as a model mother, Aida wants to end her role as a housewife. She decided to realize herself and switch responsibilities with her husband, and stand at the head of the family hierarchy. The old balance is broken...

After he’s grounded by an injury, a high-flying bachelor is saddled with two wide-eyed orphans as they come face-to-face with the dangers and beauty of the outside world.

Robert Langlois is now married to Catherine, the former housemaid. And they would live happily ever after if the housing crisis did not force them to live together with Gabrielle and Fernand, Robert's parents. For, despite the good will on either side, tension soon arises. What else to expect when there is too little space in their Montmartre apartment for four people (then for six then eight, the couple having... two pairs of twins!) ; the continued presence there of Fernand (who loves peace and quiet) after he is driven to retirement ; the difficult beginnings of Robert as a lawyer in a room of the apartment, etc... Other troubles follow and the harried family is on the verge of implosion...