When HEUNG WING meets up with the drug dealer, Senior Inspector WAI SAI-LOK comes to arrest them but HEUNG WING escapes successfully. SAI-LOK discovers from his boss that HEUNG WING is an undercover police from the Narcotics Bureau. HEUNG WING tries to mingle with the drug dealers by pretending to be a drug maker. HEUNG WING’s subordinates HO KWAI, NIN YAU-FU and CHENG CHI-SHING help to take care of his family while he is carrying out duties. After arriving at the divan, HEUNG WING discovers that the most wanted man LEE BING-LUNG is the owner of the drug factory. Representing the Intelligence Unit of the Narcotics Bureau, SAI-LOK waits outside the drug factory with colleagues from the Operations Unit. SAI-LOK decides to utilize CHAN KA-PIK’s home as a temporary control centre for further investigation and he urges KA-PIK’s younger brother KA-CHUN to let them in. KA-PIK and her good friend NG TAK-TIM return home to collect some goods……