A swashbuckling Irishman opposes French agents during the Napoleonic wars.

When he unwittingly sends some of his men into a trap, pirate Captain Peter Blood decides to rescue them. They've been taken prisoner by the Spanish Marquis de Riconete who is now using them as slave labor harvesting pearls from the sea.

Working-class girl Joan Dodd's plan to marry Jack Fowler is thwarted when her mother Gladys interferes. Hoping to improve her daughter's social status, Gladys arranges for Joan to wed her boss Adolphus Pickering while Jack is away at war. Jack arrives home to discover his love is engaged to another man. Who will Joan decide to marry?

A police detective baits killer gamblers with a mob witness (Patricia Medina) in the Everglades.

When several women are found mutilated and murdered, the Paris police are baffled as to who the killer may be. All evidence points to Dupin, but soon it becomes apparent that it is someone (or something) stronger and deadlier than a human.

An American cowboy living in Mexico discovers his cattle is being eaten by a giant prehistoric dinosaur.

A female version of the man in the iron mask. In this version the mask is put on a princess (patricia medina) rather than a prince as in the original book by Alexander Dumas.