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After getting out of prison, Esa (Hannu Kivoja) has had a hard time finding legitimate employment. Sometimes he takes jobs under the table that require him to beat up selected members of the Finnish underworld as punishment for one offense or another. As his reputation as a bruiser becomes better known, he begins getting calls to "service" Lindstrüm (Esko Salminen) a masochistic male psychiatrist, with beatings. The psychiatrist finds his attentions extremely satisfactory, and contracts to become Esa's exclusive employer. Their relationship becomes quite intricate, with paternal overtones. When Esa wants to stop giving the psychiatrist his regular beatings, in favor of starting a "normal" relationship with a young woman (Leea Klemola) the psychiatrist goes beserk, and concots schemes that make it hard for his protege merely to stay alive, much less get free from this demented father-figure's clutches.