During the Tianbao period, the Tang Dynasty reached its peak. The Tubo Dynasty sent a princess to Chang'an to negotiate peace. At this time, An Lushan's son An Qingxu moved his capital to Chang'an with unclear intentions. In Chang'an, under the joint governance of the Bad People, the General's Mansion, and the Jinwu Guard, the prosperous and beautiful scenery, poetry, wine, dance and music were as usual. However, what kind of danger was hidden behind this splendor? The Tubo envoys, the son of the border army governor, and the court inner guards, three forces, met by chance. On the eve of a grand martial arts competition, a strange murder case cast a shadow on the entire competition. The magnificent event was mixed with conspiracy and wisdom. What will be the ending of the story? Will it be a mutiny of the border army, an invasion by foreign enemies, or the suppression of the dark clouds of war... The wheel of history is waiting for you to drive...