In the interior of Brazil, a farmer is responsible for the education of the daughter of one of his settlers. Years later, the girl returns from school with a nun and the farmer does everything to prevent her from know her parents.

Countryman J.K. gets annoyed and quits his job on a farm when his boss sends his pet cow to a slaughterhouse in town. In search of the animal, J.K. goes to the city and, there, is harassed by several single women.

For three days at the Copacabana Palace in Rio de Janeiro, amorous cross-fertilizations are intertwined with petty tricks against the backdrop of the famous carnival festivities. Three (sympathetic) accomplices are beaten to a punch in the hotel vault; three charming stewardesses are looking for entertainment, but their three Carioca host, musicians Tom Jobim, Luiz Bonfá, and João Gilberto, are married; a man, separated from his wife, wants to catch her in the act of adultery.