Everyone in the capital knew that Gu Linyuan, the eldest son of Prince Jing'an, was a loser. In the court, half a piece of sesame seed cake fell out of his sleeve, but he turned around and was ordered by the emperor to investigate the fatal Nancang deficit case. In order to survive, he could only pretend to be crazy and talk nonsense. Unexpectedly, the princelings, the second princes, and the powerful officials in the prime minister's office regarded every nonsense he said as a far-sighted plan. Everyone thought he was playing a big game, but only he knew that at first he just wanted to survive and overturn his father's case. But when the Nanchang case leads to an old injustice, he discovers that misunderstandings can also be his first step in overturning the chessboard.