Su Yi, a modern cultivator, failed to survive the tribulation and traveled through time to become the useless prince of the Nanhou Mansion in Daxia Town. At the beginning, he was framed by his stepmother and younger brother. He relied on his previous life's cultivation and thunderous methods to reverse the crisis, take control of the Hou Mansion, and get acquainted with Xiao Linshuang, the eldest princess with a special physique. The two formed an alliance. Su Yi eliminated political enemies and strengthened his power outside, while Xiao Linshuang strategized inside and gradually took over the power to supervise the country. When the late emperor passed away and the court was in turmoil, Su Yi used cultivation methods to expose the prince's conspiracy and helped Xiao Linshuang ascend the throne and become the first female emperor of Great Xia. After his success, Su Yi refused the reward and chose to become the "empress' man" to create the prosperous Kaiyuan era alongside her.
