Jacques accepts his grandfather Jericho's invitation to spend his summer holidays at his country home. The problem is that Jacques is separated from his wife Marie and has started a new relationship with another woman, Agathe - none of which is known to his grandfather. So as not to hurt the old man's feelings, Jacques and Marie agree to pretend to be the prefect happy couple during their holiday with him. Jericho is more astute than they realise, however, and has arranged the holiday with the aim of bringing the couple back together…