Vanya, a young scientist has spent all his life in a satellite town next to one of the biggest nuclear stations. Just like his parents, Vanya works at the nuclear station, but, as he thinks, not by vocation, but solely because of his long-time love for his former fellow- student Tanya. She, on the contrary, is absorbed by her work, she is ambitious and demanding in personal relationship. One day Tanya decides to end this relationship, because she doesn’t see a reliable life’s companion in the infantile and light-minded Vanya. But sudden events which occurred in the “nuclear” town place everything in context: the heroes ma-nage to find their vocation and real love.