Tanya, a young educator, accompanies twelve teenagers to a theatre festival in Sochi under the supervision of Maria Genrikhovna, an experienced head teacher. Initially, there's little sympathy between the two teachers. However, they discover a deeper bond in much more fundamental things: aversion to marching in formation and other forms of officialism. Their ability to find joy even in challenging situations unites them.

Yana lives in northern town, works at the post office, collects stamps and waits for her father from the sea, but she doesn't even hope for his coming home. One day sailor Petr comes to the post office, and it changes Yana's life.