Bernadinho and Pedro are students and face the classic tasks of fulfilling school obligations, taking good grades, being well behaved and complying with school rules, increasingly elaborated thanks to director Ademar. Frustrated, Pedro ends up finding a diary of how to cause chaos in school without being caught, which leads the two friends to follow the tips of the notebook.

Coming from outer space, Prince Flick asks the Trapalhões to help him free his planet from the domain of evil Zuco and free Princess Myrna, who has been taken prisoner. He offers a reward, the four friends accept the mission and embark in a spaceship driven by a hairy monster called Bonzo. Once on the planet, they they defeat Zuco, but they fail to save Princess Myrna's life. Her place on the throne is then taken by Loya, the girlfriend Didi met on that planet. Back on Earth, os Trapalhões think their adventure was but a dream, but they are convinced otherwise when they find their reward.

Cinderelo is a quiet young man from a small town, looked down upon by his peers for being dirty and cowardly. In truth, he is very brave and shows his strength when a family of devout people asks the group for help against a powerful landowner, Colonel Dourado. The colonel covets the family’s land, which is located in an oil-rich area. Dona Ivete, the landowner’s niece, assists the Trapalhões in fighting against the henchmen led by Souza.