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.
Klaus on varkaudesta nuorisovankilaan tuomittu koululainen, joka vapautuessaan huomaa elämänsä muuttuneen. Vaikeuksista huolimatta hän jatkaa opintojaan ankaran maisteri Kaharin silmien alla. Klausille apuaan tarjoavat entinen tyttöyst...