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.

Industrialist's son returns from the USA, where he'd been supposedly studying Nuclear Physics, when in fact he'd devoted himself to pop music, without his father's knowledge.

Man finds a job as a dog catcher, but feels sorry for the animals and sets them free.

A poor girl must find the money to pay for her blind sister's eyesight operation.

Mariana is a young woman from the interior of Minas Gerais who leaves for Rio de Janeiro in search of a man who seduced her and got her pregnant. But the rascal man gave her the false address, with only a photo as a reference. Staying at an uncle's house, she is faced with the difficulties of living in the big city, seeing that finding her husband in Rio is like looking for a needle in a haystack.