After modern corporate drone Chen Feng dies suddenly from overwork, he travels through time to become the Sixth Prince of Great Gan, and activates the "Ages-Old Mediocre Sovereign System". As long as he remains dissolute and wayward, ruins the national fortune, indulges in beauty, and ignores state affairs, he can gain rewards and raise his cultivation level, and on the day Great Gan falls, he will ascend to immortality. Thus, he intentionally suspends court, selects concubines, builds the Eastern Depot and Embroidered Uniform Guard, cuts down feudal domains, and flirts with the Empress of Northern Mang, single-mindedly seeking the destruction of his country. But every time he messes around, he is "over-interpreted" by those around him, instead making Great Gan stronger and stronger. In the end, Chen Feng finds that destroying the country is too hard, so he simply uses the system's "National War Module" to declare war on Fusang, pacify the Wokou banditry in Lingnan, incorporate the Xuanxiao Sect, and build treasure ships and artillery.