YIN and YEE go to the movie together. YIN wants to make open their relationship, but YEE wishes he could do something to improve his relationship with SUM first. The case has been cracked. YING believes it calls for a celebration. SUM suggests playing tennis and throwing a BBQ party. YING’s female friends flock to YIN at the party. YEE is not pleased. Some hikers have found a corpse on the mountain. YIN and HEI run into some illegal immigrants when they are collecting evidence. After watching the video of YIN and HEI’s interrogations, SUM concludes that the murder was not carried out by the illegal immigrants. It turns out that the victim is well-known paint dealer WONG CHUN-YUE. His daughter, WONG PUI-MAN, tells TING she did not go hiking with because of a foot injury. The team go to YUE’s house to probe into the case. YUE’s son, HIU-TUNG, has an emotional breakdown all of a sudden. He tells the team YUE had been cursed…