In her previous life, Empress Xie was betrayed by her own son, Crown Prince Xiao Herui. After her death, an imperial decree ordered her burial in the consorts' mausoleum. Reborn, she left the capital and spent eighteen years practicing medicine. When the Crown Prince desperately sought to save his adoptive mother, Su Lingyi, he repeatedly forced Empress Xie to come and treat her. The Emperor arrived and revealed the truth, prompting Xie to return to the palace and settle old scores. She exposed Su Lingyi's poisoning plot to steal her son, along with the many crimes committed by the entire Su family. She also saw through the Crown Prince's selfishness and treason, and supported the upright Prince Qi, Xiao Hechen, as the new heir apparent.