From a Vietnamese legend, Phí Phông—a bloodthirsty mountain demon— Còn (Kiều Minh Tuấn) and Dương (Minh Anh), two apprentice shamans, struggle to save their cursed mother. As brutal deaths plague a remote village, suspicion falls on Mon (Diệp Bảo Ngọc). Starring Nina Nutthacha Jessica Padovan—known from the Death Whisperer trilogy—this tale unveils a darkness far older than myth. Dark secrets hidden within the forbidden forest pull them into an endless hunt to uncover a terrifying truth beyond imagination.