Li Qi (played by Luo Jialiang) was excluded and made difficult by the police chief Lei Jin (played by Luo Yingjun) because he was unwilling to go along with him. However, Li Qi was smart and clever, and he repeatedly solved strange cases with his own strength, so Lei Jin could not do anything to him. Luo Bangban was the master who taught Li Qi to become a talent. He told Li Qi that if he could solve the unsolved case of the female thief Black Rose 20 years ago, he might be able to completely overthrow Lei Jin. Li Qi was eager to fight and was full of fighting spirit. In order to investigate the case, Li Qi came to the Li Chi Nightclub, but he accidentally ran into his old friend Xie Si (played by Lam Ka Tung) who was in trouble. Not only was he involved in the disputes of the underworld, but he also lost his only residence. So Li Qi lived in Xie Si's uncle's house, and thus met the beautiful and kind Cheng Baozhu (played by Maggie Cheung). What Li Qi didn't know was that the Black Rose he wanted to hunt down was actually lurking beside him.