Stefano Garbelli is employed by a pharmaceutical company. One evening Daniela, a young independent prostitute, approaches Stefano pretending to be a nurse. They get together, but Daniela has a sinister plan.
| Actor | Role |
|---|---|
 Ugo TognazziStefano | Stefano |
 Ilaria OcchiniDaniela | Daniela |
 Margrete RobsahmCarla | Carla |
 Marisa MerliniAmalia | Amalia |
 Mario CarotenutoCount Gaetano | Count Gaetano |
 Franco Giacobinicommissario | commissario |
 Mario Castellanimarito di Amalia | marito di Amalia |
 Raimondo Vianello(uncredited) | (uncredited) |
 Anna ManduchiNurse (uncredited) | Nurse (uncredited) |
 Pinuccia Navaprostituta romana | prostituta romana |
 Gianni MusyNando Marcellini | Nando Marcellini |
 Olimpia CavalliClaretta | Claretta |
| RRenato MamborRaffa | Raffa |
| FFranco CiuchiniTripoli | Tripoli |
 Aldo BertiRighetto | Righetto |
 Franco ResselRené | René |
 Armando Bandiniragionier Bandini | ragionier Bandini |
 Consalvo Dell'Artivice commissario Donati | vice commissario Donati |
| FFranco MoruzziNot listed | Not listed |
| NNino NiniNot listed | Not listed |
| AArrigo PeriNot listed | Not listed |
| MMyriam PisaniNot listed | Not listed |
 Massimo RighiNot listed | Not listed |