The film demonstrates all stages of production of the yellow fever vaccine that took place in the Yellow Fever Service laboratory of the Rockefeller Foundation, located in Manguinhos, Rio de Janeiro, next to the Oswaldo Cruz Institute.

At the Rockefeller Foundation, the rat colony for experiments with viruses and antibodies in humans. In Ilha dos Macacos, next to the Oswaldo Cruz Institute, in Rio de Janeiro, the creation of Rhesus monkey by the Rockefeller Foundation - a primate species that allows the monitoring of experimental yellow fever.

Carlos Sebastião Prata Filho watches, for the first time, an interview given in 1963 by his father: Grande Othello. Alongside his four children, Grande Othello talks about his first experience in theater. Roquete Pinto, the interviewer, then starts asking the boys questions and records unexpected moments.

Between captured images, animations and scientific descriptions, the puraquê electric fish is presented through the eyes of Humberto Mauro and Carlos Chagas Filho.

In Rio de Janeiro, Gilberto (Celso Guimarães) is a talented artisan engaged of Marina (Lídia Mattos), working in a pottery factory. He is hired by the millionaire widow Luciana (Carmem Santos) to perform a restoration in her castle in Correas, a district of Petrópolis. He suffers an accident and Luciana lodges and treats him for a long period, and they fall in love for each other.

A short documentary about the Victoria Regia.

Short documentary about orchids.

Balanced on a perch, the parrot is encouraged to imitate the sounds of human speech.

An adaptation of Machado de Assis' eponymous short story, preceded by a short telling of the author's life and works.