The golden hamster Paule is horrified: His human family wants to go on vacation, and he is not allowed to come along! Instead, he is supposed to stay with a foster family that also has a hamster named Karlchen. However, Karlchen is not at all thrilled about the situation either. Panic and despair set in for both of them, as hamsters are true loners! But fate takes its relentless course, and the two meet. A huge disaster is looming! Suddenly, something completely unpredictable happens, and they end up experiencing the greatest adventure of their lives... An extremely exciting and funny children's novel - not just for hamster fans!.