In Bianliang of the Northern Song Dynasty, the royal Cuju team "Qiyun Society" encountered strange things one after another. A main player falls and gets injured mysteriously during training, a needle is hidden in the ball in a key match, and secret messages from the team are frequently stolen. Former jailer Shen Yan was temporarily called into the team because he knew how to play Cuju and was good at investigating cases. He has no golden fingers or special background. He only relies on careful observation and logical reasoning. Amidst the suspicion among the team members, the pressure from officials, and the obstruction of secret forces, he gets closer to the truth step by step. Every Cuju game is a gamble of life and death, and every team member hides a secret. Shen Yan not only needs to find out the mastermind behind the scenes, but also needs to survive in the crisis-ridden stadium and officialdom.
