Giovanni and Raffaella are happily married from ten years, but their relationship goes into crisis when Raffaella falls in love with Valerio Mantovani, a handsome forty-year-old man she knew during the concerts of chamber music she weekly attends with her mother.
| Actor | Role |
|---|---|
 Alberto SordiGiovanni Macchiavelli | Giovanni Macchiavelli |
 Monica VittiRaffaella Macchiavelli | Raffaella Macchiavelli |
 Silvano TranquilliValerio Mantovani | Valerio Mantovani |
 Laura AdaniElena | Elena |
 Ugo GregorettiMichele Parodi | Michele Parodi |
 Mariolina CannuliDaniela Parodi | Daniela Parodi |
 Néstor Garaypadre Bardella | padre Bardella |
| GGaetano Imbrómedico | medico |
| KKarl-Otto AlbertyBauer, il coreografo | Bauer, il coreografo |