During the reign of Emperor Zhenzong of Song, a group of young talented people with extraordinary skills join the Plough Department and solve mysterious cases together. Tai Sui (Xu Ke) grew up in the countryside. When a crime occurs in his surroundings, he meets Wu Yao Guang (Dai Lu Wa) and Liu Sui Feng (Zhang Yu Jian) who work for the Plough Department and are about the same age as him. Tai Sui follows them and eventually also joins their team. The Plough Department is a special unit under direct supervision of the emperor and operates in secret. After they solve a series of cases together, Tai Sui discovers that there is a big conspiracy behind those cases. Moreover, they’re related to Tai Sui. The Plough Department sets out to uncover the truth.