Jacques spends his summer vacation with his grandfather, Jericho, in the company of his wife Marie. The malicious ancestor quickly realizes that his grandson's marriage is on the brink of breakdown. He does everything to save him.
| Actor | Role |
|---|---|
 Michel SimonLe vieux Jéricho | Le vieux Jéricho |
 Marie DuboisMarie | Marie |
 Serge GainsbourgRémy | Rémy |
 Yves LefebvreJacques | Jacques |
| MMary MarquetLa Duchesse | La Duchesse |
| TThalie FrugèsAgathe | Agathe |
 Jenny HéliaJeanne | Jeanne |