A Wolf at the Door is a 2013 Brazilian thriller drama film written and directed by Fernando Coimbra, in his feature directorial debut. The film follows the story of Sylvia and Bernardo, the parents of a kidnapped girl, and Rosa, Bernardo's lover, who is suspected for the kidnapping. It is based on a real-life crime that occurred in the 1960s, where a woman named Neyde Maria Maia Lopes ("The Beast of Penha") kidnapped and killed four-year-old Tania Maria Coelho de Araujo ("Taninha").

Plot

A mother and housewife named Sylvia goes to pick up her daughter Clara at school, and finds her missing. She is told by the teacher that she received a phone call from someone who claimed to be her, saying that she was sick and that a neighbor would come pick her up instead.