S1·E18 Episode 18

CHU witnesses how they recognize each other and has a strange feeling. It is because the girl, who is called CHI, is CHU’s younger sister. “The Four Villains” arrive. SHUN is defeated but he is saved by FUNG as FUNG wants to kill SHUN by himself. HING leads his colleagues away after being defeated by FUNG. CHU worries about SHUN’s safety and she reminds FUNG to investigate the case thoroughly before taking any action. FUNG questions SHUN and as SHUN has misinterpreted FUNG's question, SHUN admits that he has committed the crime. FUNG decides to kill SHUN.