Those who have interfered with the Tomb of Ra-Antef are in terrible danger. Against expert advice, American showman and financial backer of the expedition, Alexander King, plans a world tour exhibiting this magnificent discovery from the ancient world but on the opening night the sarcophagus is void of its contents. The mummy has escaped to fulfill the dreadful prophesy and exact a violent and bloody revenge on all those who defiled his final resting place.

An eclectic group of characters set sail on Captain Lansen’s leaky cargo ship in an attempt to escape their various troubles. When a violent storm strikes, the ship is swept into the Sargasso Sea and the passengers find themselves trapped on an island populated by man-eating seaweed, giant crabs and Spanish conquistadors who believe it’s still the 16th century.

Stuart Whitman is Shatter, an international hitman who is hiding out in Hong Kong after he has completed a contract out on an African leader. Shatter soon finds out that everyone wants him dead, including the crime syndicate, the cops and the brother of the African leader he killed. Shatter teams up with a kung fu expert (Ti Lung) to try to get the money that is owed to him. Various double crosses and fight scenes ensue.