Matto, a marine biologist, goes to Brazil in search of the most intelligent animals in the world: dolphins. Martina wants to visit Bahia, the cradle of Tropicalia, in order to understand herself and the world. He believes that all human progress is due to the animal kingdom. She walks in her sleep. The bond between them, their evolution, the different absurd and fantastic situations they go through, the characters they meet, the concerns that move them, the reflections they make; all are portraits of man's animal behaviour. Although wild boars also kiss on the mouth, bonobos make love looking at each other's faces and birds have multiple forms of seduction.