Shen Yanzhi, the eldest son of the Duke of Zhenguo, pretended to be stupid for three years to avoid trouble. He was ridiculed by the government and the public as the "silly prince" and became the plaything of the powerful children. Even his marriage contract was trampled on at will. In fact, he is extremely intelligent and thoughtful, and he pretends to be stupid just to secretly plot to find out the truth about his mother's murder and regain the family power that was usurped by his uncle. Shen Yanzhi appears to be silly and can be bullied, but in fact he is decisive in killing. Once his bottom line is touched, he will tear off his disguise and fight back with thunderous means, slapping everyone who despises him in the face. In the end, he will eliminate the traitors and gain power, becoming a trusted minister of the emperor, and redressing his mother's injustice.