Tat-wah gives On-na the cold shoulder. He accuses her of not keeping her promise all those years ago. On-na wants to make it up to him. After much effort, she eventually finds some unique robot which Tat-wah has always wanted. On-na feels hurt as Tat-wah is ungrateful. Pak-keung takes Tat-wah and Dan-gei hostage as he is accused of extortion. Pak-keung wants to sort things out with Yiu-chung. Yiu-chung reveals Pak-keung has been profiting himself. He seizes this chance to take over some bar venue that has been managed by Pak-keung. Vengeful Pak-keung slyly drugs and kidnap Yiu-chung. CCSIU follows up on the homicide case. They sense the story is rather complicated as they discover names of persons who had died in previous two years in the victim’s phone’s contacts list. They also notice some deceased persons have common characteristics. They suspect the perpetrator has some specific aim. On-na is then worried about Tat-wah’s safety.