Yang Ji, reborn into the Sui Dynasty as the Prince of Suian, within half a year manipulates his father, Yang Shuang, into becoming the King of Wei. He then becomes the King of Wei himself. Even before Prince Jin Yang Guang shows any ambition for the throne, Yang Ji becomes Yang Guang's sworn brother. With his mother's encouragement, he becomes the ultimate playboy through fighting. However, upon reaching adulthood, he discovers that Gao Yan, whose downfall is inevitable, is to become his father-in-law. Initially, Yang Ji only wants to escape Gao Yan and live a carefree life with Yang Guang's support, but things aren't as simple as he imagined. The story unfolds at a slightly slower pace.