The old man has a son who suffers from bipolar disorder. Previously, his son was an ordinary child, but hard life and constant stress caused the boy a nervous breakdown. When the disease worsened, he was sent to a hospital. After a year of treatment, the doctors let him come home. The sick guy returned to Hong Kong to his father again. And now they have to hang out together in a small room. They are both in a state of deep remorse because of the tragic accident that killed the main character's mother. Tension increases every day. They both feel anxious and worrying. Over time, they realize that their common pain is not the only reason for conflict. Is it better to avoid or resist? Is it easier to refuse or accept a person as he is? Is it better to say no or try to make changes and correct the behavior of someone close to you? These difficult life questions worry the main characters of the Chinese tragic drama "Mad World 4k blu-ray". Will relatives be able to become truly relatives again?