In the Dasheng Dynasty, there were wars and wars everywhere. In the north, there were Turkic barbarians knocking on the gate with their iron hoofs, and there were powerful officials from aristocratic families manipulating the court.
The third prince, Xiao Lin, is stationed in the northern border. He wears armor and holds a sword, guarding Yanmen with his own flesh and blood. He is sincere and only wants to protect the country and the border. He will live up to his family and his brother. Prince Xiao Jin sat in Yanjing, supervising the country's administration, and protected him in every possible way during the turmoil in the court. The two brothers, one from the south and the other from the north, supported each other and were once known as role models for both the government and the public.
However, the imperial power is as ruthless as a blade. The old emperor uses checks and balances, aristocratic families secretly instigate, rumors are like knives, and suspicions gradually arise. The former brothers and sisters gradually fell into pieces due to military power, reserve positions, and the chess game of life and death. From heart-to-heart letters to official documents, from protecting each other to meeting each other in battle, they share the same blood, but eventually become strangers.
Xiao Lin was forced into a desperate situation and led the Northern Xinjiang cavalry to raise the flag to clear the emperor's side; Xiao Jin was trapped in the reserve throne and sent his troops north to fight against the rebels. Brothers confront each other and meet on the battlefield. On one side is the righteousness of family and country, on the other side is the desire for power, and on the other side is the deep love of youth that cannot go back.
When the Turks broke through the northern border and civil strife spread across the mountains and rivers, Xiao Lin gave up his personal hatred and resisted external humiliation, decided the world in one battle, and finally sent his troops to Beijing to rule the world. On the top of the Forbidden City, he was sitting on thousands of miles of mountains and rivers, holding the Beichen Frost Blade in his hand, protecting the world, but he could never find his brother who had promised to protect him for the rest of his life under the wall of the Yanjing Palace.
Machiavellian plots, killings, betrayal, and perseverance are a tragic song of separation between brothers, and an imperial journey to end wars with war.