My Dearly Sinful Mind(2017)

My Dearly Sinful Mind is a Hong Kong psychological thriller that follows Chung Tai Yin, a grieving psychologist who spends five years uncovering the truth behind his girlfriend's fatal car crash. His investigation leads him to discover that she once assessed a schoolyard murderer whose psychological profile suggested he lacked motive or violent tendencies. As Chung Tai Yin digs deeper, he meets Tung Yat, a brilliant but socially awkward young man with Asperger syndrome, and his sister Tung Yuet. Their unlikely alliance draws in police officer Wu Tin Yeung, whose past undercover operation was derailed by Tung Yat's social difficulties. Together, the group pursues leads to identify the true killer. When Wong Hoi Ching, a missing witness from the original case, suddenly resurfaces and visits the imprisoned suspect, the investigation takes a shocking turn that unravels everything they thought they knew.