Chen Zhao discovered that his biological son was actually the illegitimate son of his wife Lin Man and her lover Zhang Zhe. He endured his grief and smiled on his wife and children, secretly planning for three years. When Zhang Zhe tried to abscond with the money, Lin Man bit Chen Zhao to protect himself. He finally showed his fangs and detonated all the evidence that the two conspired to embezzle the company's funds. Grandma Chen's treasured birth records, her son's hidden recordings, and Officer Zhou's investigation, these three killing moves are closely linked. He smiled as he watched them kneel down and beg for mercy, not to vent their anger, but to let them see clearly: the most terrifying thing is not betrayal, but being nailed to hell by the person you trust most.