PsychiatristKO LAP YAN (Alex Fong) is completely disheartened by the death of his wife (Kate Tsui), and had plans to quit his job and leave Hong Kong. Before he leaves, he encounters a psychopath murdering case and investigates the case with forensic psychiatrist LEUNG KAI WING (Edwin Siu), thereby regaining his passion for psychiatry. With the advice fromhis good friend LIN CHI SAM (Ram Chiang), YAN decided not to leave and joined the forensic psychiatry branch. In his new job, LAP YAN meets hiscolleague CHEUK WAI KIU (Yoyo Mung) and policewoman LAM CHUNG YAN (Tavia Yeung). LAP YAN and CHUNG YAN quickly became friends, while KIU developed feelings for him. The three get entangled in a subtle love triangle, each keeping their feelings inside... LAP and YAN encounters aserial killer case and based on his analysis, it was very likely that the killer is someone he knows. Meanwhile, LAP YAN discovers his wife's death was not an accident...