Justina urges Pete and Runt to get a job. As a result they meet an orphan boy named Otto while working as a park nannies. They offer to shelter the boy, but at the same time the father Antti, who has returned from the sea, is looking for his son together with Miss Raikas.
Schoolboy Klaus is convicted of theft and sent to prison. At his release Klaus feels that his life has changed a lot. Despite all his hardship and difficulties he keeps up his studies under the supervision of the grim Master Kahari.