Sarah Fittler and her nine-year-old son take a taxi to return home from the cinema, but are abducted by the driver, Bob, and brought to his house. As a result of abuse his father inflicted on him and his brother, Bob is a serial killer who rapes and murders young women he captures. He kills Sarah and forces her son, whom he renames "Rabbit", to become his personal prisoner. When Rabbit tries to escape, Bob chains him to the wall.