Chu Yi accidentally crosses over, becoming the Great Chu Emperor Chu Yu. At this time, the emperor is like a puppet, with court politics controlled by factions such as Prime Minister Su Wei and Empress Dowager Li Shi, the national treasury is empty, and the border is in urgent crisis. Chu Yi binds to the shocking life-extension system, with only seven days of life left, and must extend his life through real political achievements and changes in the court situation. Starting from rectifying the court, he employs Qian Youde to investigate embezzled silver, gradually uncovering the interest chains behind the interception of military rations, official cliques, and the loss of the border. As Northern Yan invades, Chu Yu begins building the army, developing firearms, improving people's livelihoods, and taking on the responsibilities of an emperor in choice after choice.