On the eve of his wedding, a young doctor leaves Moscow to see his mother who lives in a nature reserve. Things are complicated by the fact that the doctor's ex-girlfriend is also there, and she is expecting a child.
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.
