Mercenary king Fang Han grows tired of killing and returns to the city, hoping to live a quiet life. However, he discovers that the Song family and his sworn elder brother, Wan Chengtian, are fighting over the position of chairman of the largest financial conglomerate, a conflict that also involves his adoptive father and his girlfriend, Su Qingqing. Fearlessly standing up to the powerful, Fang Han seeks the truth and takes down criminal forces. Despite learning of the Song family's past schemes against his girlfriend, Fang Han's love remains unchanged. He upholds justice and cracks down on the Song family's illegal activities. In the end, Wan Chengtian also accepts their relationship, and the two finally end up together.