Winning the affection of classmates can sometimes be a lot of work... A new student, Jana, arrives in the seventh grade of a Prague school. She is a clear top student when it comes to the subject matter, but otherwise she is impractical, clumsy, and completely inept at physical education. That's why she gets the nickname "The Weenie" and the class distances itself from her and even persecutes her with various cruelties. František and Růžena, children of scientists who have ideal parents, try to help Jana, but when Jana reveals how she broke the window and that Růžena encouraged her to deny it, Růžena also hardens against her. In the end, however, the children understand Jana and accept her among them...