A modern university chemistry professor transmigrated into the body of the third young master, Huo Changyuan. The original owner was the number one playboy of the capital—cockfighting and dog-walking, listening to tunes in brothels, and running up debts at gambling dens, becoming a laughingstock across the city. This story is set in a fictional Dayan dynasty, where the northern Wolf Court knocks on the gates year after year, and the court values civil officials while looking down on military ones. The Marquis of Dingbei's estate has guarded the north for three generations; his father, Huo Zhan, is the current Grand General of Zhenbei, and his eldest brother, Huo Changning, died at Yingzuigu three years ago, his remains unreturned. Following the protagonist as he investigates the truth behind his brother's death and matches wits and courage with the emperor to protect the Huo family's foundation, step by step he becomes the guardian of the Yan state.