Xiao Zhenshan, the Marquis of Zhenbei of the Great Xia, has been living in seclusion among ordinary people. When his grandson, Xiao Yunfei, is bullied by powerful nobles, a fraudulent imperial examination scandal masterminded by Zhao Shi, the Minister of Personnel, comes to light. To cover up his crimes of colluding with the enemy kingdom of Yue, Zhao Shi frames the Xiao family at every turn. Step by step, Xiao Zhenshan gathers irrefutable evidence and joins forces with court officials and the military. With plans unfolding both at court and along the frontier, and after numerous twists and turns involving joint trials, confrontations in prisoner carts, and surprise attacks on the border, he finally exposes the traitors who betrayed their country and clears the Xiao family's name. Grandfather and grandson, one skilled in civil affairs and the other in military affairs, protect their homeland and ultimately secure peace and stability.