Spring 1942. Moscow schoolgirl Katya is corresponding with a cadet of the naval school Kostya, who is unknown to her. When sent to the front, his echelon must pass through Moscow, and they have a chance to meet ... Our days. Muscovite Katya, a talented violinist and a wild child, without realizing it, begins to follow in the footsteps of the history of Katya and Kostya, her peers from the war years. Will she be able to finish an amazing teenage love story that began years ago?

In 1942, Red Army officer Nikolai Kiselyov receives orders to evacuate over 200 Jewish women, children, and elderly men facing brutality and death in Nazi-occupied Belarus. These exhausted, starving, terrified and bereaved people, deeply scarred by the horrors they have witnessed, must trek hundreds of kilometers along forest paths to regain hope of survival and faith in the future.

A talented doctor, a rich slacker, a good mother and other people whose life looks perfect only from the outside are in an eternal search for an answer to the question of what happiness is.