Gong Biao was Wang Xiang's brother-in-law. He was a college student and worked in an office in a factory. After meeting his wife's cousin through Wang Xiang, they started a crazy pursuit, and finally the two became husband and wife.He was still convinced by Wang Xiang and helped him investigate the case many years ago. Later, after the factory closed down, he became a taxi driver.

It was precisely because he bought a new car and found out that he was cheated that he was involved in a major case many years ago, so several people started to join forces to investigate the case again. However, what is heartbreaking is that Gong Biao's wife had an affair.