In Donetsk, in the terrible and destructive atmosphere of the war, the violin teacher Larisa is raising a children's quartet. Music lessons help children escape from the effects of total horror. Larisa inspires children with her example of resilience and courage, desperately hiding her personal family tragedy. Soon the quartet will fall apart and the children will disperse in different directions. Before that, they will have their last joint performance in Moscow, in which they will enter into far from their last battle with darkness, horror and death.