When Shuai Jiamo, who is obsessed with mathematics, stumbles upon a historical problem in Jinhua County, he was met with multiple obstacles in his attempts to correct the mistake, triggering a tension between various stakeholders.

• Zhang Ruoyun
• Qi Wei
• Wang Yang
• Wu Gang
• Gao Yalin
• Fei Qiming
• Hou Yansong
• Zhai Xiaoxing