Ning Cai, the teacher of the town, comes across Nie Xiao who's been chased after by Spirit Hunters and rescues her. Ning Cai believes that good and evil spirits can peacefully coexist with humans. Spirit Hunters release Black Hill, the evil spirit who was sealed for a long time. To protect the people, Ning Cai decides to head to the junction of people and spirits with Nie Xiao, risking his life.