KWUN asks LUNG to make business deal with him. LUNG seizes the chance to set up CCTV in the dinning area. WAN is heart-broken to discover that CHIU was having an intimate relationship with a Thai lady LOY before his death. LOY comes to give money to WAN and claims that she is not CHIU’s mistress. WAN is suspicious about it. SUN discovers that LOY has reminded CHIU to be careful when drinking water in a letter. On the other hand, YUE is investigating the death of three youngsters. She discovers that all of them came from rich families and they used to surf the same website. She suspects that their deaths are related to the flash mob. YING’s good friends HA KAU and PO JE bring her to join the flash mob where they meet a guy called RAY. RAY suddenly comes to visit YING. LUNG arrives and pretends to be YING’s boyfriend so that YING could get rid of RAY. SUN goes to a church to carry out investigation and he meets the bishop ROCK……