Phí Phông—a bloodthirsty demon from the mountain folk legends that has haunted generations. The film follows Còn (Kiều Minh Tuấn) and Dương (Minh Anh), two apprentice shamans who journey into the mountains to save their mother, who has fallen under the Phí Phông curse. At the same time, a series of gruesome deaths begin to plague a remote village, casting suspicion on Mon (Diệp Bảo Ngọc) and her daughter Lua (Nina Nutthacha), who exhibit traits eerily similar to the demon. Yet, buried deep within the cursed forest lie shocking secrets, drawing Còn and Dương into an endless hunt for the true face of Phí Phông.