D.I.D. 12 Episode 1

One and a half years ago, Ying Hoi investigated the disappearance of teenage girl Tsang Ka Yi, a case linked to a powerful conglomerate. The investigation was eventually forced to stop due to external pressure. During the case, he also witnessed Ka Yi’s mother being killed in a traffic accident. In the present, Ka Yi suddenly reappears on the streets in a disheveled state. The Regional Crime Unit, led by Ding Lok Fung, takes over the case and suspects Fu Yat Ming, the grandson of a wealthy businessman, may be involved. Following clues from Ka Yi’s belongings, Ying Hoi tracks down the location where she was held and discovers a village house containing multiple captives. Back at the station, he analyzes the case and suspects someone may have helped Ka Yi escape. (Source: Chinese = TVB || Translation = KamilaRN at MyDramaList)