A jade seal etched with cloud patterns brings two destinies together. Lin Wei, the long-lost only daughter of the Marquis of Zhenbei, arrives in Chang'an with the seal and her knowledge of medicinal herbs. While treating the laid-back Prince Xiao Che's injuries, she gets caught up in the secret struggle between the Eastern Palace and the frontier army.
Xiao Che has a hidden plan, and the jade pendant in his sleeve matches Lin Wei's seal. The Crown Prince's plot to secretly collude with the Turks comes to light. The Marquis of Zhenbei's iron cavalry rides into the Gobi, only to discover a traitor in their ranks, while Lin Wei's mother lays a medicinal trap in the enemy camp.
Family bonds and affection intertwine as power struggles and the flames of war ignite their passion. Beneath the moon over Chang'an, they join hands to break the deadlock, carving a bloody path to the light with their shared bloodline and sincere hearts.
