Finnish Kerttu Nuorteva is spying for the Russians in Helsinki during World War II. She is arrested and interrogated in the hope that she will uncover the Soviet Union espionage tactics.
The film follows Finnish army machine gun company in Continuation War against Soviet Union, 1941–1944. Based on Väinö Linna's best selling novel Tuntematon Sotilas (The Unknown Soldier) and the novel's uncensored version, Sotaromaani (A War Novel).
Self-taught philosopher Konsta Pylkkänen guides a group of researchers through Finland's Kainuu wilderness in the hopes of having a "sinistä ajatusta", idea out of the blue. While firing upon a hybrid of the hazel grouse and the western capercaillie, kinds of birds, he indeed makes a scientific discovery.
