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João Grilo is a backwoodsman who tries to get along at the expense of the powerful in the city, who pretend to be respectful of morals and good customs and hide their sins. But when a band of cangaceiros attacks the small town, everyone has to settle accounts with God and the Devil.

Educational material produced by the National Film Institute (INC) on the basic principles of energy transformation, addressing topics such as solar energy, rain, evaporation, and molecular motion. The video uses instructional animations to explain the water cycle, along with footage and experiments that help build an understanding of kinetic energy, or motion, which is responsible for the electrical energy that powers cities.