Su Wan, a concubine in Southern Xia, was poisoned and mute by her sister-in-law Su Qingyue, and was forced to go to Dayan for her to get married. On the way, she was bound to the system of the rise and fall of dynasties. Relying on the systematic detoxification pill, he escaped from death, killed the silence eunuch sent by Su Qingyue, and obtained the prophecy of Yimachuan flash flood.
After arriving in Dayan, Su Wan faced the tyrant Xiao Jue and solved the murderous problem by knowing his innermost secrets, but was thrown into the cold palace. She triggered a hidden mission in the cold palace, found the relics and secret letters of the late emperor's beloved concubine, and learned the secret of Xiao Jue's biological mother's life experience. With her token and wisdom, Su Wan gained Xiao Jue's initial trust and was named Concubine Hui.
Nanxia took the opportunity to raid Yinmachuan, and Su Qingyue personally sent an envoy to instigate general Dayan to rebel. Su Wan used the system to see through the conspiracy and offered advice to Xiao Jue to use the plan to severely damage the Southern Xia army. In the end, Su Wan was canonized as the Protector's Lady for her role in bringing peace and stability to the country. With the same status as the prince, Su Wan could participate in court discussions and gain a firm foothold in Dayan.
