Kong proves that Nam is not the murderer. Shan then asks Kong to pretend to be her boyfriend to camouflage herself with the image of an unfaithful lover so as to lure the lovelorn murderer into light. The murderer tries to harm Shan, but she manages to escape. Kong and Shan discuss a sentence the murderer has used from Nam's university thesis. Kong asks Ho to go to the university and track down the person who has stolen the thesis. But Ho falls asleep. Luckily, there are clues on the security camera tapes.
