Lotte and Louise meet at a summer camp. Everyone who sees the two falls open in surprise, the girls look so much alike. It doesn't take long before they find out that they are actually twins.
Nine-year-old Lisi discovers that her mother, who has fallen into a coma, may be brought back to life by the power of a "Wolpertinger". Determined, she rounds up her friends to catch the mythical creature and save her mother.
