Dzvinka goes to the neighbors across the sky - to the Blue Planet - to find the missing screw by the moon-flying FlightOne. There, she meets Myshko, who is the only child who dreams of spending the holidays on the Moon. Dzvinka is glad that she will have a friend. The only thing that upsets her is the naughty behavior of Myshko. So she creates the "Commandments of the Moon Fairy", finding out about which one can stay on the Moon, and then invites the boy to her home. Myshko tries to follow Dzvinka's rules and saves FlightOne life.