In 1880s Brazil, famous detective Sherlock Holmes and his partner Dr. John Watson are invited to solve a crime involving actress Sarah Bernhardt and a mysterious hairy bush. Based on a novel.

Ivan Canabrava is a writer, turned insurance ivestigator who investigates mysterious deaths involving Bufo Marinus. Bufo Marinus is a frog poison causing catalepsy in humans, simulating death, enabling grand insurance fraud and other crimes. Ten years later, now as a successful writer, similar characters possibly using Bufo Marinus reappear and create an intricate plot full of surprises.

This film shows three episodes: "The First Sin" portrays the relationship of a man and married woman; in "Devilish", the desire between a young woman and her brother-in-law is shown; and in the episode "Cachorro!", a man sees his wife with her lover.