Ko Lap Yan, the Senior Psychiatrist of Yan Wo Hospital, is a competent and kind-hearted doctor who specializes in severe schizophrenia and even minor mental illnesses. Yan cures his patients not only by medication but also by psychological analysis. He diagnoses the cause with reference to the symptoms. The plot is interesting, intricate and extraordinary. The psychiatrist Lin Chi Sum and the nurse Li Ying Chun are both good friends of Yan. Sum is keen on helping people. He has cured a patient suffering from a binge eating disorder Suen Ka Pik. They have overcome a lot of difficulties and become a couple. Yan is a divorced single father with a daughter. After the failed marriage, he did not long for love affairs until he chanced upon an Inspector of the Serious Crime Unit, Mok Man Yee. They have gradually developed their relationship through a business contact. However, in order to avoid the recurrence of genetic and mental diseases, Yee detaches her feeling from Yan.