Duke Altichieri rises to power, after his associate, Cpt. Alberico, kills governor Conte Filippo della Scala. 10 harsh years of tyranny follow, until a mysterious figure appears out of nowhere, helping people in their struggle against the regime. He is known by the name Red-Masked Prince, but who is he?

A team of highly trained Italian seamen are taken to the island of Stampalia where there are to take their torpedo-laden attack craft on a daring attack on the port of Suda.

Alberto Gherardi, a sailor is wrongly suspected of murder, flied and enroll into the Foreign Legion. His unfaithful fiancee Irene goes to look for him with his young brother Enrico, but the latter is killed. Will she still manage to free her lover?