When Estonian violinist Eduard Sõrmus starts his concert tours in Europe, he is convinced that the world revolution is about to begin. His mission as a Red Violinist is to call the proletariat around the world to join with the revolution. It is only two things - music and revolution - that Eduard has dedicated himself to. His audience is enchanted by his performance and ignited by his ideas. With this knowledge, he travels Europe between the two world wars, accompanied by his faithful friends, his audience's admiration and the hostility of the authorities.

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.