Li Zihao and Fang Jie have gone through many bloody battles and gradually become brothers in life and death. Unexpectedly, Fang Jie's long-cherished object, Mr. Tang's beloved daughter Tang Qianqian, fell in love with Li Zihao at first sight, and Li Zihao also discovered at this time that his sweetheart Lan Ruoyun became Mr. Tang's mistress during his arrest. In order to dominate Shanghai, Mr. Tang set up a shocking scam, and the most important part of this scam was Li Zihao. But Mr. Tang didn't know that Li Zihao's true identity was a member of the assassination organization Blue Shirt Society. Mr. Tang finally found out Zihao's true identity, and the two confronted each other head-on. A gunshot was heard. Who fell in the end? What choice will Fang Jie make? How will Qianqian face the life-and-death struggle between her father and her lover...