Shen Anruo, a modern agent, transmigrates into the legitimate daughter of the Minister’s Manor in Nanzhao. On her wedding night, she catches her fiancé and her adopted sister in secret. With her portable space, she empties the Marquis Manor and exposes their plot in public. She volunteers for a political marriage to the Crown Prince of Tianyuan, yet accidentally gets entangled with Crown Prince Shang Xuance. Shang Xuance approaches and tests her under a dual identity. Affection grows between them amid mistaken identities. After arriving in Tianyuan, Shen Anruo navigates the treacherous imperial court. Together with Shang Xuance, they fight against the Prince Qin’s forces and finally fall in love with each other.
