YAT-KEI asks SIU-NAM to accompany his wife to concert but SIU-NAM rejects him with excuse for he seems to have feelings on LAI-HING again. LAI-HING suspects that SAI-TING is really her daughter and she asks private detective to investigate her. SAI-YIN believes that KELLY is the “Wednesday Serial Killer” and he worries that SIU-NAM will discover it soon. KELLY is upset that SAI-YIN didn’t mention to CHOR-KIU that they have become lovers. ERIC and the others worry that KELLY will disclose SAI-YIN’s secret to the police. They persuade SAI-YIN to kill KELLY. CHOR-KIU has dated SIU-NAM to watch the full moon together. She goes to the supermarket to buy a lot of food for preparing dinner. However, SAI-TING suddenly arrives with crabs for she wants to have dinner with SIU-NAM and LAI-HING…