Tom Proby is a representative from a British engineering firm sent to Sicily to convince the landowners (all in the Mafia) to allow his company to build an oil refinery on some waterfront real estate. Proby talks to the mob bosses about the project, but disagreements between different bosses complicate his efforts.
| Actor | Role |
|---|---|
 Virna LisiRosa Minniti | Rosa Minniti |
 Peter McEneryTom Proby | Tom Proby |
 Gabriele FerzettiDon Calogero Minniti | Don Calogero Minniti |
 Jean ServaisBaron Misceni | Baron Misceni |
 Agnès SpaakThe Prostitute | The Prostitute |
 Nino TerzoCarmelo | Carmelo |
 Carla CalòRosa's Governess | Rosa's Governess |
| SSalvatore FucileNot listed | Not listed |
 Roy BosierNot listed | Not listed |
 Bruno LauziNot listed | Not listed |
| AAdriano VitaleNot listed | Not listed |
 Lando BuzzancaNot listed | Not listed |
 Duccio TessariNot listed | Not listed |