Modern historian Chen Yan traveled through the eve of Jingkang and was trapped in a torrent of millions of refugees. He used his wisdom to integrate the remaining soldiers, tame the dead soldiers, and quietly forge the anti-gold iron fist. In the refugee army, the fierce veteran Liu Qingya supported him from confrontation to life and death; the female doctor Su Wanniang used her life to save his remaining soul; the abandoned son of the Jin Kingdom, the Iron Bone Slave, became the sharpest knife in his hand. When Zhao Zongxian's poisonous plan is about to detonate Bianjing, Zhou Huaijin's Shilin counterattack tears people's hearts, and Chen Yan finally reveals his identity - he is the last bloodline of the Song Dynasty's orthodoxy. The throne is never inherited, it is snatched back.