In a futuristic world where the polar ice caps have melted and made Earth a liquid planet, a beautiful barmaid rescues a mutant seafarer from a floating island prison. They escape, along with her young charge, Enola, and sail off aboard his ship.
Count Dracula adjourns to Earth, accompanied by Frankenstein's Monster, the Wolfman, the Mummy, and the Gillman. The uglies are in search of a powerful amulet that will grant them power to rule the world. Our heroes - the Monster Squad are the only ones daring to stand in their way.