Pee is a cute little worker bear. Pupù, on the other hand, is a greedy and chubby little bird while Rosmarina is an affectionate bunny. The three little heroes find themselves having to look for the perpetrator of a theft of musical scores. To identify the culprit, they will have to deal with some great operas, transforming them into tasty and brilliant parodies.

The body of a young hooker is found one night in the center of Rome, killed with a single gunshot. By questioning the pimp who exploited the young woman, and the former prostitute who was the woman's best friend, two police officers will solve the mystery.