The young headmaster of a boy's boarding school has decided that due to the virility of his young charges, they are a sort of national treasure. He believes that his school should become co-educational as soon as possible. In order to raise funds for the changeover, the boys stay behind during their summer vacation and temporarily convert the school into a love hotel.
Police constable Møller'og psychiatrist Dr. Mogensen will have something to watch as the Pusle to everyone's surprise finds out that she can do magic. On her birthday she gets sent an ancient, magical figure from her uncle in South America. On the same day Pusle's parents has to travel to London, and the large family is now left to strict aunt Alma.
