Semyon is a loner, a recluse, who has cut himself off from others and who suffers from his loneliness. One day, in the park, he meets a mysterious girl, Yulya, and, as if hypnotized, tells her everything that is going on in his soul.
Later, when he meets Yulya again, she offers him a choice: to stay in his ordinary life or to make changes.
Having agreed to her offer, Semyon finds himself in a pioneer camp in 1989, in a world different from the one he is used to... Will he be able to change?