Da Xia (played by Liu Qingyun) works for the famous underworld boss Tang Jun (played by Ekin Cheng) and helps him kill the traitor Hei Niu, which is very appreciated by Jun. Da Xia kills the adulterer in anger, and Jun runs around for him to get him off the crime. Since then, the two have become inseparable. Unexpectedly, Jun was framed by his elder brother Wei for drug trafficking and was wanted by the police. He had no choice but to sneak back to the mainland to take refuge. Jun's girlfriend La Jiao (played by Qiu Shuzhen) went to seek revenge on Wei, but was captured and tortured. Two years later, Jun returned to Hong Kong. Jun found that Da Xia had become a big celebrity around Wei, but Da Xia didn't know that it was Wei who framed Jun that day. Jun was desperate and wanted to retire from the underworld. When Da Xia learned that Wei was the mastermind behind the incident, he vowed to help Jun get revenge!