On the day the Crown Prince ascends the throne, his pregnant Crown Princess, Pei Lingyi, is deposed. The new emperor falsely accuses the Pei family of rebellion, sentencing the entire loyal family to death. Overcome with grief and fury, Pei Lingyi is forced to drink an abortion potion in the Cold Palace and dies a tragic death from excessive blood loss. Reborn into her previous life, she returns to the day the emperor arranged her marriage. This time, she decisively cuts ties with her ill-fated match and cleverly avoids marrying the Crown Prince, choosing instead to wed the usually overlooked Ninth Prince, Xiao Jingche. Drawing on the memories of her past life and the strength of her maternal family, she wholeheartedly supports the Ninth Prince, carefully plans every move, and joins forces with him to overthrow the Crown Prince and seize the throne. She becomes the new empress of Great Yin, standing shoulder to shoulder with the new emperor in the imperial court.