The protagonist, Lin Yu, is naturally optimistic. After unexpectedly discovering that he is a spirit hunter, his life takes a different course. He bravely faces danger for his companions, gives up his own chance to survive for his family, and endures being gnawed at for the one he loves. Amid danger and life-or-death struggles, he transforms as a person. Behind each perilous incident, more schemes come to light. Can he solve the mystery?