I am Li Jinglong, and this is the story of me and the Ming Dynasty. Modern security guard Zheng Qian soul-travels to the 17th year of Hongwu, becoming the historical 'buffoon' Duke of Cao, Li Jinglong. At that time, Li Wen had just passed away, and with mature intellect, he maneuvers between Zhu Yuanzhang, Crown Prince Zhu Biao, Lan Yu, Chang Mao, and other noble elites and imperial power of the early Ming, resolving crises and winning people's hearts with his wits. By reorganizing the Guanglu Temple and creating the 'First Street Under Heaven' to accumulate strength, he unexpectedly discovers dark plots hidden behind the deaths of Crown Princess Chang and Imperial Grandson Zhu Xiongying, moving step by step in the imperial power game, rewriting his own and his family's destiny, and uncovering the deep palace's secret plots.