The young music lovers, together with a cheerful little Overtone and Fairy of Harmony, set off to the journey to the amazing country of Orchestria. The road runs through the cities of Hammerburg, Stringbruck, and Trumpetdorf, where the children meet their inhabitants — percussion, string and wind instruments, learn their voices and characteristic features and try to play them. At the end of the journey, the inhabitants of the music cities will gather in the country of Orchestria and show what they are capable of — with the help of the children.