Based on a true incident, this tells the story of a troubled young man who kills his sister's reactionary, violent and abusive husband and is eventually arrested for the murder. However, the dead husband happened to be a member of the Italian nobility, and the trial starts to turn into more of a prosecution of the defendant's socialist politics and the activities of his father, a well known liberal social reformer, than the actual crime itself.
| Actor | Role |
|---|---|
 Giancarlo GianniniTullio Murri | Tullio Murri |
 Catherine DeneuveLinda Murri | Linda Murri |
 Fernando ReyProf. Murri | Prof. Murri |
 Tina AumontRosa Bonetti | Rosa Bonetti |
 Rina MorelliGiannina Murri | Giannina Murri |
 Ettore ManniDott. Carlo Secchi | Dott. Carlo Secchi |
 Paolo BonacelliFrancesco Bonmartini | Francesco Bonmartini |
 Giacomo Rossi StuartRiccardo Murri | Riccardo Murri |
 Lino TroisiIl giornalista | Il giornalista |
 Laura BettiTisa Borghi | Tisa Borghi |
 Corrado PaniPio Naldi | Pio Naldi |
 Marcel BozzuffiGiudice Stanzani | Giudice Stanzani |
 Loretta Rossi StuartMaria Bonmartini | Maria Bonmartini |
 Francesco D'AddaNot listed | Not listed |
 Luigi Antonio GuerraNot listed | Not listed |
| BBruno LanzariniNot listed | Not listed |
| AAndrea MatteuzziNot listed | Not listed |
 Kim Rossi StuartNot listed | Not listed |
 Monica ScattiniNot listed | Not listed |
| MMario TessutoNot listed | Not listed |