In the majestic capital city, the imposing presence of Six Doors led by the skilled bounty hunter (Cheng Taishen) gathers experts with a fierce style, becoming a dominant force in the court. At this time, counterfeit copper coins are rampant in the capital, and the top bounty hunter, Cold Blood (Deng Chao), plans to capture suspects, resulting in a fierce battle at the Drunken Moon Tower with another group. This group is led by Zhuge Zhengwo (Anthony Wong), who has skilled fighters like Ruthless (Liu Yifei) and Iron Hand (Zou Zhaolong) under his command. The bounty hunter is suspicious of the true intentions of the God Marquis Mansion, so he pretends to drive Cold Blood away, allowing him to infiltrate the God Marquis Mansion to investigate Zhuge's true purpose. Subsequently, Cold Blood joins forces with Ruthless, Iron Hand and Chasing Life (Zheng Zhongji) to form the Four Great Detectives, gaining prominence. Meanwhile, Ji Yaohua (Jiang Yiyan) from Six Doors seems to hide a dark secret and conspiracy...