Guido, a young idler with a gambling problem falls in love with Caterina a mysterious girl. A torrid affair follows thereafter. When Caterina leaves him Guido investigates her past and learns she had a lot of lovers.
| Actor | Role |
|---|---|
 Anthony DelonGuido | Guido |
 Sophie DuezCaterina Marini | Caterina Marini |
 Antonella LualdiAdelaide Biotti | Adelaide Biotti |
 Gastone Moschindottor Trigona | dottor Trigona |
 Leonardo TreviglioTibiletti | Tibiletti |
 Carola StagnaroTeresita | Teresita |
 Angelo InfantiRoberto Dionisotti | Roberto Dionisotti |