Murder Diary(2021)

Murder Diary is a Hong Kong crime series that weaves psychological trauma across generations. Yeung Pik Sum's untreated schizophrenia has fractured her son Yip King Fung's mind into separate identities—one a skilled handwriting expert and criminal profiler, the other an undercover agent. When a string of brutal murders makes King Fung the prime suspect, his sister becomes traumatized and his estranged mother, now working in a mental hospital, struggles to protect her family while seeking redemption. Superintendent Lip Shan recruits King Fung for the Special Crime Unit, where he joins a psychiatrist, bomb disposal expert, and forensic anthropologist to pursue criminals with severe psychological disorders. The series explores how mental illness shapes investigation and justice, as King Fung's fractured psyche becomes both his greatest asset and his deepest liability in solving complex cases.