Trade counselor Lillukka leaves his entire fortune to Pekka Puupää, who, thanks to cartoons and films, has become closer to him than his immediate family, who are pursuing their own interests. Pekka starts running a toy factory and hires a freckle-faced bowling boy as the company's errand boy. Widowed trade counselor Gunilla Lillukka tries to get married to Pätkä, who has been promoted to assistant director.
Paavo and Eeva, two young people who have moved from the countryside to the city, meet a gang led by Kalle, who spend their time loitering and committing petty crimes. A fateful evening on a motorboat irrevocably changes the young people's lives.
