Flashbacks: LOUIS reveals to HEI how he got to know his father KO NGAU. Now that NGAU has passed away, LOUIS needs ON to help arrange a final meeting for HEI and his late father. With the help of LOUIS, HEI has not only acquired permanent residence in Hong Kong but is also sent to the Police Academy for a series of training sessions. Unfortunately HEI has failed in all subjects and the then Academy Principal SCOTT is going to kick him out of the school soonish. Knowing that HEI will be expelled from the Police Academy for his poor performance, ON notifies LOUIS at once and LOUIS is kind enough to intercede for HEI. ON’s wife and mother are caught in a fire, but they just get rescued by HEI in the nick of time. ON has regarded HEI as a member of his family ever since then……