The Lyre of Delight (1978)

During the Carnival, in Niterói (city next to Rio de Janeiro, Brazil), the son of a Lira do Delírio (Lyre of Delirium) nightclub dancer is kidnapped. With the help of a journalist friend, she dives into Rio de Janeiro's underworld and meet all kind of criminals. She also goes back in time, to a past carnival, where she thinks she might pin-point the culprit among a group of people.