The story mainly tells that the eldest son of Duke Dingguo died young. In order to stabilize the military power and ensure that the Han family army in the north would not be affected by the DPRK, Han Yuanniang, the eldest daughter of Duke Dingguo, replaced her twin brother Han Shiyi as the eldest son of Duke Dingguo. Han Shishi externally portrays himself as a lustful, ignorant and ignorant playboy, but unexpectedly becomes the companion of the fifth prince Chen Yanyi...