The troublesome daughter of an American millionaire accompanies him aboard his yacht on a deep sea diving expedition in the Red Sea and falls in love with the captain.
| Actor | Role |
|---|---|
 Sophia LorenBarbara Lama | Barbara Lama |
 Steve BarclayPaolo | Paolo |
 Umberto MelnatiSebastiano Lama | Sebastiano Lama |
 Alessandro FersenProf. Krauss | Prof. Krauss |
 Antonio CifarielloPierluigi | Pierluigi |
| MMasino ManunzaMasino | Masino |
| AAhmed Ben YusufKassin | Kassin |
| GGualtiero De AngelisNarratore (uncredited) | Narratore (uncredited) |