Once a year, every Saci Day, October 31st, also known as Halloween, the sacred book that brings together all the legends of Brazil is revealed. But on that date, other international mystical beings intend to steal the book and national legends and legends need to do something to stop them.

Jonathas lives with his parents and his brother, Juliano, in a cottage in a rural area of the Amazon. The family harvests and sells local products at a roadside fruit stand, a place of contact with new friends and novelties from the rest of the world. They meet Milly, a visitor from Ukraine, and the native Kedassere. The group decides to spend the weekend at a campground in the jungle. Against his father's wishes, Jonathas will embark on this adventure. Seduced by Milly and the forest, he undertakes his most transforming journey.

Ane spends her afternoons playing around the forest with her cousins until she encounters Anhangá, an indigenous spirit that surrounds her community. But when she goes deeper into the forest, Ane is faced with a real haunting.