Overview: SAI-LOK and HEI-SUEN return to the factory building for investigation. SAI-LOK discovers how CHI-FAI has escaped. WING-TUNG and HEUNG WING go to dinner together. WING-TUNG suddenly discovers her boyfriend quarrelling with somebody and she is surprised. HOK-LAI learns that the number of drug-taking venues in Sham Shui Po has increased a lot and he asks HEUNG WING to carry out investigation. While investigating the case, CHI-SHING learns that CHI-FAI has left Hong Kong. He quietly informs HO KWAI to wait at the pier together. In fact, SAI-LOK and HEI-SUEN have been monitoring the two of them. WING-TUNG freezes all the assets of CHI-FAI but CHI-FAI reveals that he will not be sentenced easily for somebody powerful is supporting him. HOK-LAI is eavesdropping HEI-SUEN and SAI-LOK’s conversation. He realizes that they are investigating whether HEUNG WING and the other three cops are dirty cops……