Anselmo is a young anthropologist who is tormented by jealousy, and although his wife Camilla does not give reasons, keeps a close eye on her. After consulting a psychiatrist, the doctor says the problem is him and not his wife. So he plots to verify, once and for all, if his suspicions are true. By chance he meets an old friend, Lotario, who seems the ideal person to carry out his plans. What Anselmo does not know is that his friend is a real womanizer who ends seducing his wife.
| Directing | José María Forqué | Director |
| Writing | José María Forqué | Writer |
| Writing | Jaime de Armiñán | Writer |
| Production | Nicola Princigalli | Production Assistant |
| Camera | Manuel Martínez | Still Photographer |
| Writing | Giuseppe Mangione | Writer |
| Costume & Make-Up | Carmen Martín | Makeup Artist |
| Sound | Romano Rizzati | Music |
| Costume & Make-Up | Salvatore Cotroneo | Hairstylist |
| Camera | Ramiro Sabell | Assistant Camera |
| Camera | Adolfo Troiani | Assistant Camera |
| Writing | Edoardo Anton | Writer |
| Writing | Miguel de Cervantes | Novel |
| Art | Flavio Mogherini | Set Decoration |
| Production | Aurelio Serafinelli | Production Manager |
| Directing | Sinesio Isla | Assistant Director |
| Camera | Cecilio Paniagua | Director of Photography |
| Editing | Petra de Nieva | Editor |
| Costume & Make-Up | Dolores Clavel | Hairstylist |
| Lighting | Casimiro Dengra | Electrician |
| Production | Serafín García Trueba | Production Assistant |
| Sound | Marcel Royné | Sound |
| Camera | Clemente Manzano | Camera Operator |
| Sound | Roberto Pregadio | Music |
| Camera | Mario Sensi | Camera Operator |
| Editing | Isabel Campos | Assistant Editor |
| Art | Juan Casado | Property Master |
| Costume & Make-Up | Paquita Pons | Seamstress |
| Production | Alfredo Matas | Producer |