SHUI-KI and SAI-WING are monitoring HEUNG WING’s team secretly. HEUNG WING brings his team to capture CHI-FAI but he discovers that the person is not CHI-FAI. SHUI-KI discussed the corrupt cop issue with SAI-LOK and HOK-LAI asks to join their investigation. When HOK-LAI is arguing with SAI-LOK, they learn that HEUNG WING’s team is leaving the police station secretly. After so many tests on the suspected corrupt cops, SHUI-KI decides to call off the action. SAI-LOK feels ashamed and guilty for suspecting HEUNG WING. HEUNG WING and the other three are awarded a commendation for capturing CHI-FAI successfully. However, HEUNG WING suddenly receives a call from AGENT and he recalls the shameful memory of becoming a corrupt cop. Two years ago when they were carrying out duty, CHI-SHING secretly takes money from the drug dealers out of greediness. A mysterious person called AGENT has taken video of it……