Twenty-seven-year-old Canan (Ayça İnci) and her husband Volkan (Burak Hakkı) have just moved into a large, new house. Life seems to continue on its routine track in the young couple's new house until one day, when Canan starts feeling that strange things are happening to her although she cannot understand what or why. Canan gradually starts turning into an evil creature as a mysterious and malicious being takes control of her body and actions day after day. Semum, the most loyal servant of the devil, has taken control of Canan, leading her toward hell.