Pipì, Pupù and Rosmarina, flanked by new and funny characters, travel through the world of opera to tell children about its repertoire. Three short animated films in which the three little friends entertain the audience by developing their vision of the story and singing the famous arias of three classical music masterpieces: "Don Quichotte" by Jules Massenet, "Lo schiaccianoci" by Pëtr Il'ič Čajkovskij and "L'italiana in Algeri" by Gioachino Rossini.