A portion of the tail of a prehistoric reptile is discovered in Denmark. It regenerates into the entire reptile, which proceeds to destroy buildings and property and generally make a nuisance of itself. It can fly, swim, and walk, and has impenetrable scales, which makes it difficult to kill.

• Cinemagic
• American International Pictures
• Bent Mejding
• Asbjørn Andersen
• Ann Smyrner
• Mimi Heinrich
• Dirch Passer
• Marlies Behrens
• Carl Ottosen
• Ole Wisborg