A modern person accidentally transmigrates into a storybook, becoming the Great Gan emperor who is about to abdicate the imperial throne in seven days. Seeing the crown prince suffer all kinds of grievances and the court factions harboring secret plots, he no longer lets people manipulate him, but instead agrees to abdicate on the surface while secretly investigating clues, rectifying the palace, and protecting the crown prince. On the day of the abdication grand ceremony, all sides think victory is in their grasp, but the emperor produces evidence in public, step by step uncovering years of hidden feelings, stabilizing the political situation, and also letting the crown prince regain his confidence, with father and son joining hands to open a new path of state governance.