The attempted coup of Estonia on Dec. 1, 1924, conducted by Comintern, staged by the Soviet Communists, failed and resulted in many lost lives on both sides. The Communists were forced underground.

A young investigator fresh from the university gets assigned an arson case. 18-year-old Epp-Kai has admitted to the crime but he cannot see the girl's motive. His partner, an experienced investigator, already has enough work and doesn't think it's necessary to have further conversations with the accused. The young investigator senses however that Epp-Kai is hiding something.