Molang and Piu Piu's house is haunted by a phantom saxophonist! At first, they were terrified of the ghost, but now they've decided to get over it. Instead, they'll help their new phantom friend succeed in his chosen field of music…At the funfair, Piu Piu wins a goldfish, which he gives to Molang as a present. Thrilled, Molang takes the fish home and lavishes care on it. A real bond develops between them! But as time passes, Piu Piu becomes more...