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.
Two brothers, Ras and Jan, have always been together during the long training to become jet pilots in the Danish Airforce. They both join squadron 793, where they will serve on active duty under the the young and very energetic squadron leader, Captain Tom Jessen.
Six people—three couples—meet by chance at a dance restaurant in Copenhagen's nightlife scene. A marriage swindler and former actress, an elderly Supreme Court lawyer and his wife, and a young couple with equal parts courage and erotic repression. As the evening progresses, the empty champagne bottles pile up. Old inhibitions are cast aside and new connections are formed – and none of the six leave as they arrived.
