

After 50 years of marriage, retired general François Marsault (André Dussollier) is still madly in love with his wife Annie (Sabine Azéma). However, when he finds a few old love letters in the attic of his house, he is completely taken aback. Because the verbose outpourings about his wife Annie's "vibrating mound of Venus" were definitely not written by him. He couldn't care less that the letters are 40 years old and only have museum value at best. Polyamory in his house? Unthinkable! To clear his honour, there is only one solution: he must leave his Annie and make his way to Boris (Thierry Lhermitte), her former lover, to demand revenge. François mobilises his secret service connections and tracks down the Casanova of old on the Riviera. Confident of victory, he travels to sunny Nice with Annie. But his attractive (and very athletic) rival is by no means unarmed: As a bon vivant and musical free spirit, Boris knows how to casually defend himself. While Annie enjoys the trip down memory lane and the nightly skinny-dipping with her new old cavalier more and more, François gets caught up in his plans for revenge. But perhaps it's about more than just wounded male honour?
This is a continuous multi-day event