Yak is on a relentless quest to avenge his sister Yam, killed by the Black Spirit, despite his family urging him to stop. Fearful that the spirit will return to harm his loved ones, Yak investigates a newborn's mysterious death and discovers the Black Spirit is controlled by a powerful shaman, Puang, hiding in the mystical Dong Khomot. Yak must face deadly spirits and dangers to defeat the Black Spirit once and for all. Meanwhile, as his sister Yad prepares to marry, the family hopes for Yak’s return, unaware that the Black Spirit is on the verge of bringing terror back into their lives.