The protagonist Chen Shihan travels back to the body of Emperor Chongzhen with modern knowledge, and relies on his understanding of the history of the late Ming Dynasty and modern ideas to try to save the Ming Dynasty amidst the complex situation of internal and external troubles. His goal gradually shifted from the initial goal of "continuing the Ming Dynasty" to "changing the political system and promoting the modernization of the Ming Dynasty." In this process, he needs to face the constraints of powerful ministers, the threats of foreign enemies, as well as cooperation and confrontation with emerging forces, and at the same time experience personal emotional entanglements and sacrifices.