During a Soviet circus tour in Japan, a small street musician, Ken, meets a clown, Yuri Nikulin. Upon learning that his sick father is being treated in the Soviet Union, Ken sets off in search of him. The friendship of the great clown and the boy continues in Moscow.

Based on the story "The Chicken God" by Y. Zbanatsky. Six-year-old Sergei from the Yantarny kindergarten finds a magical stone – "the chicken god." When he looks through a hole in the stone, the world becomes magical and beautiful. With this treasure, Seryozha sets off on a journey, meeting all kinds of people, until his teachers find him.