During the English Civil War, Lord Forrest attempts to sign up with the Royalist army, but is mistaken for a Roundhead and forced to join their number instead.
A patrol of twelve soldiers is lost in the desert and killed by the tribesmen, but the sergeant makes sure that one of the tribesmen dies for every one of his men.
A newlywed couple have a fight, and in order to get even with one another, each decides to take up with a lover but without actually going through with "the deed".
When 'Gentleman' Burton boards the Capri his aura of mystery makes the crew curious about his origins and makes him especially attractive to the Captain's daughter. But he little realises the danger that is to unfold when the Captain conceals diamonds on board as a favour...
