Chen Yan's son was poisoned and fell into coma. His stepmother Lin Wanrou knelt down and cried bitterly, identifying him as the murderer. Amid the ridicule on the Internet, he remained silent and only handed a tape of the recording to the police station. His wife died mysteriously three years ago, and he has endured it until today, just waiting for this day. What he doesn't know is that Lin Wanrou's biological son Chen Hao is secretly writing a diary; his ex-wife's sister Zhou Peiyun has already laid a net in the dark; even the silent old housekeeper is hiding an old murder case that was buried. When poison is spit out from the mouth of a biological child, who is the real monster?
