Shan Liang is a bounty hunter known in the industry by the codename Warden. Gifted with a special supernatural ability, he specializes in eliminating mutated creatures known as Black Stone Evil Spirits. After completing a mission in H City, he accepts a bounty from a laboratory in M City, where he discovers that the laboratory is colluding with criminal forces and secretly connected to a shadow organization called the Black Stone Cult. Shan Liang joins forces with Bateer and Wang Xiaohua to form the Bonfire Squad. Together, they investigate the truth, destroy the Black Stone Cult's branch known as the Night Yaksha, and pursue their enemies to I City. When the Black Stone Cult's Divine Realm leader emerges, Shan Liang and his companions team up with Wang Jingang, a Thousand-Man Commander of the Great Wall Watch, to face their formidable enemies at a towering structure in I City.