In the autumn of the ninth year of Wude, the Tang Dynasty was not yet firmly established. Within the red walls of Chang'an Imperial City, the chess game of power was already undercurrent. King Li Shimin of Qin has made great achievements, and the battle for the throne with Prince Li Jiancheng has become increasingly fierce. There are many factions in the court, and every word and deed affects life and death. Outside the northern Xinjiang Great Wall, the Xue Yantuo tribe took advantage of the situation and colluded with the remnants of the Turks to knock the pass and move south. There was a continuous fire at the top of Shuozhou City, and the border residents were displaced. Su Chen, the former supervisory censor, was relegated to the border for being involved in a previous case, but he unexpectedly learned the secret information of the East Palace's collusion with Northern Xinjiang. On the one hand, he was entrusted with the safety of his old friend in Chang'an, and on the other hand, he was concerned about the life and death of the soldiers and civilians in Northern Xinjiang. Su Chen was forced to deal with the war and the undercurrent. He not only had to break through the border blockade and deliver the secret message to the King of Qin, but he also had to resist the enemy's pursuit and the plot of the traitor. When the stranglehold on power in Chang'an is intertwined with the conflict in Northern Xinjiang, personal destiny has long been closely linked to the rise and fall of the dynasty. A storm related to the future of the Tang Dynasty is quietly spreading from the deep palace of Chang'an and the wilderness of Northern Xinjiang.