Rachel is a girl, adopted by an upper middle class family, who rebelled at 17 and left her family and studies at a traditional college in Sao Paulo to become a call girl. Shortly after starting work, she decided to write a blog about her experiences. Since some clients thought she looked like a surfer she adopted the name "Surfistinha" which means little surfer girl.

Stênio, the nightshifter of a morgue, has the ability to communicate with the cadavers that are brought to him every night.

Based on real events, and set in Rio de Janeiro, A Wolf at the Door is the nerve-rattling tale of a kidnapped child and the terror of the parents left behind. When Sylvia discovers her six-year-old daughter has been picked up at school by an unknown woman, police summon her husband, Bernardo, to the station for questioning. From that point on, the film takes increasingly sinister turns as it delves into the events that led to the girl’s kidnapping. With plot twists that will keep the audience on the edge of their seats, A Wolf at the Door is a darkly disturbing journey into the extreme limits of the human capacity for obsession and revenge.