Former SDU sniper TIGER HO likes gathering information in his off time so as to help the police solve crimes in secret. HON-TO and CHI-LUNG announce that all the rookies have officially become SDU members, following which they celebrate with them. At midnight, HOK-LAI receives a text message from CHI-LAI, who makes some excuses to keep HOK-LAI there after he arrives at the shopping mall. When CHEUK-YUEN and TIGER HO have a target competition, TIGER HO is attacked and he deduces that must have something to do with his good friend, TIN SUN-HEI. Bumping into HON-TO and WAI-YAN on a street corner, CHUNG-CHAI is very delighted to see them, above which he even tells WAI-YAN about the story of HON-TO and CHEUK-YUEN's elder sister CHEUK-WAH. TIGER HO takes action to solve a drug trafficking case without knowing that SUN-HEI secretly sends someone to steal the drugs……