D.I.D. 12 Episode 21

Ying Hoi’s dark personality warns Yeung Tsz Fei that if Ying Hoi remains weak, it will eventually take over completely. Accompanied by Tsz Fei, Ying Hoi visits Tang On in prison and finally gains closure regarding their shared past. The New Seven Deadly Sins case goes to court, but proceedings are delayed pending further psychiatric evaluations, and the defendant is transferred to a psychiatric facility. Meanwhile, a final video left behind by Ding Siu Ting is released, calling for justice against the last remaining “sin” of injustice. At the same time, Fu Tak Sin suddenly falls ill, and his eldest son Fu Yeung Shan, a psychologist, announces that he will take over the family business. Later, Ying Hoi temporarily allows A Yin to take control of his body, giving A Yin and Tsz Fei a chance to enjoy a romantic day together. (Source: Chinese = TVB || Translation = KamilaRN at MyDramaList)