D.I.D. 12 Episode 5

After regaining consciousness, Ying Hoi learns that Lau Nga Wai has been murdered. A clue left by the killer leads him to a mysterious website filled with riddles and puzzle boards. Yeung Tsz Fei also gains access to the site. Using evidence found in the victims’ stomachs, Ying Hoi and Ding Lok Fung discover that a masked girl is promoting a “New Seven Deadly Sins” agenda and revealing future targets. Meanwhile, Lok Fung rescues his neighbor Ho Miu Suet from her drunk ex-husband, and Ying Hoi warns him that rival officer Cheung Mun Kwong intends to get involved in the investigation. (Source: Chinese = TVB || Translation = KamilaRN at MyDramaList)