A space pirate from the distant Barracuda galaxy, possessing amazing superpowers, comes to Earth. To escape the punishment of harsh cosmic law, the alien takes on the guise of a quiet schoolboy, Mitya, and begins searching for a repeater left on Earth in time immemorial to send a distress signal to his team. He accidentally saves the girl Kristina, who is being bullied by her classmates, and finds himself in the same company with the young hooligan and bully Kolya. Now their common task is not only to escape from their alien snake-people pursuers, but also to defuse a bomb that could destroy the entire solar system. But in order to save the Earth, you first have to understand that only friendship and self-sacrifice can resolve problems on a galactic scale.

The story takes place in a small village on the beach of Sea of Azov at the beginning of 1960s. Adolescents passionately dream of love about which they have heard from their elder experienced friends. 16 year-old Ignat is the first to find out what the real feeling is. His love for an adventuress who pretends to be a singer from capital becomes destructive.