1x19 - Line Walker

In order to get some evidences, CHEUK HOI sneaks into the hotel to carry out eavesdropping but he is discovered by others. Trying to hide away from the chasers, CHEUK HOI sneaks into a dance party with SIN-CHING. CHEUK HOI invites the undercover officers to meet up but he fails to see ON-YEE. He is worried and he carries out investigation on SHIU-LEUNG secretly. With everyone's efforts, they finally discover the whereabouts of ON-YEE. KA-KEUNG and the others want to take revenge for ON-YEE by attacking SHIU-LEUNG but CHEUK HOI stops them. CHEUK HOI scolds KA-KEUNG. SIU-KA is worried about KA-KEUNG and she cannot bear to reveal her feelings to him. SIN-YAN discovers that SHIU-LEUNG is the spy in the police force. She wants to report it to the police but SHIU-LEUNG discovers it and they start a fight. SIN-YAN tries to run away but she is captured by SHIU-LEUNG eventually. Luckily, HO-KAN passes by for he is worrying about SIN-YAN.… ...