each other out of desperacy for a lighter sentence. However, one thing that they all agreed on was that the lights in their respective apartments flickered at 8pm on the night of the murder. Henry Lee as Koo Wing-keung (古永強), also known as Stingy (古寒友), one of Tsui Sai-tat's tenants. Along with Chairman Kau and Ming Jeh, he has been requesting for adverse possession for the ownership of Tsui's flat. Au Oi-ling as Chan Yuk-ming (陳玉鳴), better known as Sister Ming / Ming Jeh (Ming姐) and ex-prostitute and one of Tsui Sai-tat's tenants. Along with Chairman Kau and Stingy, she has been requesting for adverse possession for the ownership of Tsui's flat. She was the first to discover Tsui Sai-tat's dead body. Hui Pik-kei as Auntie Chat (七嬸), one of Tsui Sai-tat's tenants. Chan Tik-hak as Tsui Sai-tat (徐世達), who has been missing for twenty years. He went to Brazil because he wanted to get involved with the black market but he made an enemy and accidentally killed him. He was jailed for 20 years which explains his sudden disappearance. He came back to Hong Kong and tried to kick out the 3 tenants. A few days later, his dead body was found in a nylon bag that caught fire at a trash site. In the end, his death was an accident. Due to poor management of the building, he accidentally electrocuted himself and slipped and drowned in the bathtub. Alan Wan as Tsui Wing-lap (徐永立), Tsui Sai-tat's nephew. Case 4 (Episodes 9–12) Cheung Tat-lun as Wilson Yu Chung-kin (余中健), a wealthy businessman who had a sexual relationship with Apple. He forced Apple to take a full bottle of drugs, therefore killing her by accident. After the incident, he fled the scene and accidentally knocked down an elderly lady with his reckless driving. At first, he claimed that he did not kill Apple and she overdosed herself because she didn't know when to stop. However, after forensic evidence proved that he was the murderer, he was instructed by Eva to pretend to commit suicide by banging his head against the cell wall to show his regret. In the end, he was jailed for manslaughter. Angel Chiang as Yan Tsz-yu (殷紫如), better known as Apple, a young drug addict, who was killed by Wilson in a hotel. Lily Ho as Leung Mei-na (梁美娜), better known as Baby, a young drug addict