Plot[]
Danish Svend Viltorft dig up a section of a giant reptile's tail from the frozen grounds in , where they are drilling. The section is flown to the Danish Aquarium in , where it is preserved in a cold room for scientific study. But due to careless mishandling, the room is left open and the section begins to thaw, only for scientists to find that it is starting to regenerate.
Professor Otto Martens, who is in charge of the Aquarium, dubs the reptilian species Reptilicus (upon a reporter's suggestion) and compares its abilities to that of other animals.
the story, there’s a musical interlude in a park, with Peterson and the group of singing children. Considering that this is supposed to be a film about a terrifying monster, perhaps having a bunch of children openly laugh at the very prospect wasn’t the best course of action when trying to build suspense.
Once fully regenerated from the tail section, Reptilicus goes on an unstoppable rampage from the Danish countryside to the panic-stricken streets of Copenhagen (including one of its famous landmarks, Bridge), before finally being killed with by ingenious scientists and military officers.
However, the monster's foot is not destroyed and sinks to the bottom of the sea. The movie is left open-ended, with the possibility that the foot could regenerate.