While 23 years old nightporter Romain Esnart dreams about writing a great novel his father becomes a pensioner. Romain's father Michel doesn't like his new life and neither does his wife Nathalie like to have him around moping all the time. When Romain's 85 years old grandmother Madeleine runs away from a retirement home, the family friction is rocketing. Eventually Romain receives a postcard from Madeleine who visits Normandy. He borrows his father's car and joins her. As he learns she once attended a certain school when she was a little girl. Thanks to an understanding female young teacher she is allowed to get to know the pupils who are now as old as she was when she had to leave back then. Yet in the end it turns out that all this joy has been too exciting for her health. Time has come for Romain to say ''adieu''.