War and Peace of Mind explores what war does to the human mind and how both, the individuals and the nation as a whole, survive it psychologically. Finland and WWII, locally known as continuation war, is the backdrop of this documentary.

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).