Dora, a 45-year-old biologist lives alone in an isolated house, where she conducts an ethically questionable research. Looking for a partner she can trust, she hires a new caretaker, Mateus, not realizing that he is also hiding his own secrets. Gradually, the two grow closer and Mateus finally discovers more about Dora's research: human composting. Mateus, who applied for the job in search of his father, who he believes to have worked at the house before disappearing without reporting, confronts Dora, but she manages to lure him like prey into her office, in the Tree House.

Davi, um cético professor de psicologia que ficou famoso por escrever um livro que explica aparições sobrenaturais através da psicanálise. Após anos sem atender pacientes, ele, com o intuito de escrever um novo livro, viaja pro interior para investigar a história de um homem que acredita que sua filha está sendo assombrada pelo fantasma do antigo caseiro de sua propriedade, que se suicidou.