Video information
Detective Chan Kin-yip (played by Andy Lau) takes a statement from a suspect, Guan Bing-wen (played by Nick Cheung), who was caught peeping in a women's restroom. Guan Bing-wen denies the charges but claims he overheard several women plotting to use a strange drug to kill all the bad men in the restroom. Although Chan Kin-yip finds the story implausible, he still records the statement. That evening, a colleague informs Chan Kin-yip that Guan Bing-wen's statement has gone missing. When Chan Kin-yip takes Guan Bing-wen's statement again, he is surprised to find that Guan Bing-wen now confesses to peeping in the restroom. Chan Kin-yip suspects that the case is linked to police officer Fang Zi-qing (played by Maggie Cheung), and decides to investigate further. Meanwhile, Fang Zi-qing meets Chan Kin-yip's wife (played by Elanne Kong) in the women's restroom, hoping that she can persuade her husband to stop investigating the case. As Chan Kin-yip continues his investigation, he receives news that Guan Bing-wen has gone missing, and Guan's ex-wife Pan Xiao-yuan (played by Joey Wong) appears at this time. Chan Kin-yip, whose relationship with his wife (Elanne Kong) has become increasingly strained, comforts the bereaved Pan Xiao-yuan and they engage in an affair. When Chan Kin-yip's wife discovers her husband's infidelity, she reveals her own secret...