In the region of the Uaicurapá river, at the center of the Brazilian Amazon, men and women of different ages claim they were attacked by a “boto”. It is said that those pink river dolphins can metamorphose into human beings at nightfall to seduce the locals, and sometimes even kidnap them to their underwater city. Wherever and whenever they show up, they leave a trace of unwanted pregnancies, panic attacks and mysterious disappearances. The film will a collect a few of those stories, and try to patch up the portrait of a small fishermen’s community in present-day Amazonia — of its particular geography, the feeling of time, of its daily routine and material resources, which govern the relationship between its people and the world, between the people among themselves, and which stirs the imagination, making the very existence of those creatures possible.