The modern special forces king Xiao Zhan accidentally fell off a cliff while performing a mission. He traveled to the sixth year of Xuanhe in the Northern Song Dynasty (1124) and possessed the same name as a border soldier. At that time, the Jin soldiers were about to move south, and the court was corrupt and the people were having a hard time. With modern military literacy, Xiao Zhan started out as a border beacon and made a name for himself by improving crossbows and training special scouts. However, he was involved in the old and new party struggles after rescuing Zhao Qingzhi, the daughter of the prime minister, who was kidnapped by bandits. The troubled love between an iron-blooded soldier king and a sweet girl is intertwined in the war against gold and the conspiracy of the court. When Xiao Zhan discovers that his time travel is actually related to the "Nine Dragon Black Iron Order" passed down by Zhao Qingzhi's ancestors, the two must work together to solve the mystery of time and space and rewrite the fate of Yashan...
