S4·E28 Episode 28

CHOI thanks KWAN for giving a false statement to prove his absence at the crime scene. He loves WING and believes that FUNG has killed her. CHING brings SANG to see FAI who gives him a foot massage and makes him laugh. FAI thinks that SANG is not very healthy. As she lost her husband early, she wants CHING to find a healthier man. CHI chases after the serial killer, but he escapes and leaves a motorbike behind. SANG learns about another murder case. The victim also has trace of disinfectant. CHING visits CHUNG and finds newspaper clippings and photos about the victims. CHING uses disinfectant often and the smell triggers CHUNG to try to kill her. She suddenly goes missing which worries SANG. CHI worries about SANG after he turns depressed when CHING goes missing. KEN comforts her and reveals his feelings to her.