Students Bernadinho (Bruno Munhoz) and Pedro (Daniel Pimentel) face the classic tasks of fulfilling school obligations, making good grades, behaving well, and complying with school rules ,being well behaved and complying with school rules--increasingly-elaborated thanks to director Ademar (Carlos Villagrán). Frustrated, Pedro finds a diary of how to cause chaos in school without being caught, the the two friends follow the instructions in the diary.