Yesterday's schoolboy Kesha cannot choose a profession to his liking and does not stay long at any one job. His problem is solved by the community, which has assigned Innokentiy to work in a kindergarten. In kindergarten, Innokentiy encounters real children's pranks, which he is not prepared to cope with. He finds a way out of the situation - to enter his usual role of a buffoon, but Kesha still fails to pacify the children, and an experienced nanny Arina Rodionovna comes to his aid.