Disaster is looming in gangland because of a murder case. Cheung Sai-lun, Chinese American drama fanatic, returns to Hong Kong to look for opportunities in showbiz. Sai-lun somehow encounters a policewoman called Koo Yan-yee, who gives him an important assignment that requires him to pretend to be an orphan of Big Boss of Union Gang. With the assistance of a seasoned decoy called Ko Bun, Sai-lun becomes Big Boss. Sai-lun then repeatedly offers help to gang leader So Tsz-shan and an actress by the name of Chong Ming-lai. You Ching-shui, lady boss of some nightlife venue, and a trio of unrelated fresh-faced ladies also keep clinging to Sai-lun. While Sai-lun is starting to venture into gangland, he and Ko Bun become amicable partners. And with absolute protection provided by formidable fighter Luk Chau, crises are overcome. But nobody is aware of some shocking scheme has been awaiting him behind the gang activities.

Fixers will use any means necessary to help the triads solve the most difficult problems. Karson Chung, a fixer for a Chinese-Australian triad, wishes to leave the triads and be together with his loved one but she dies in an accident. At the same time, he is framed for murdering a triad leader. He fakes his death to escape to Hong Kong, where he starts a new life as a high school gym teacher. Jovy Cheung, a new teacher at the school, is actually the daughter of a triad leader. Her father's retirement from the triads causes waves on both the lawful and unlawful sides and even affects the school community. Karson is forced to take up his identity as a fixer again to protect Jovy and the students. When Jovy's father is murdered, Jovy is forced to take over as a triad leader to bring control to the chaotic underworld. As Karson is in love with Jovy, he swears to help and protect her. Facing a new realignment in the good and bad spheres, who can set things right again?