Helped by his guardian angel, Xuxinha, the seven year old boy, Guto, will face terrifying monsters, garbage eaters, from XYZ, a planet from a very distant Galaxy. Along with Guto and Xuxinha, will be their friends Txutxucão, a detective-dog; the clumsy partners, Jonas and his guardian angel Biel; and a very wise homeless named Euclides Arquimedes.

Together, they will help Guto to investigate a series of weird events around the Big Fart River area, where the garbage eater monsters prepare to attack the city.

The story is narrated by Xuxa Meneghel, in live action scenes, with songs specially composed for the feature.