Olli, a schoolboy from the Suominen family, accidentally causes two accidents, which he does not dare to confess to his father Väinö. He runs away from home in Helsinki and tries to get to the Savijärvi clearing camp with his friend Jaska. The journey, which began joyfully, turns into a nightmare when the boys, who have run into trouble, have to flee from the law and Olli's lively little sister Pipsa.