Modern mercenary Chen Jiuhun travels through the world of Hong Kong movies. In order to save his sick sister, he has to sneak across Hong Kong Island, but accidentally activates the most powerful auxiliary system. Complete the tasks issued by the system to obtain various abilities. During the process of smuggling, he met Wu Shihao, the future Hong Kong gangster tycoon. After planning, he rescued Lei Luo who entered the Walled City alone in the Kowloon Walled City. He was appreciated and reused by Lei Luo with his foresight in his previous life. Along the way, Chen Jiu and others settled the three major detectives, ended the underworld disputes, solved various important cases, developed new businesses, outsmarted the Independent Commission Against Corruption, and forced the upper-level ghosts. They successfully sent Lei Luo to the position of police chief and successfully took over, achieving clouds and rain!
