Zheng Zheng, the son of a sixth-rank official, was a top emergency doctor in his previous life. His soul traveled through the Liang Dynasty, and he became a down-and-out bastard who was abused by his aunt and had his fiancée break up the engagement in public. Faced with ridicule from the whole city, Zheng Zheng remained calm and went to the medical clinic to have a consultation. His modern medical skills astounded everyone. Xiao Jing, the god of war who was decisive in killing on the battlefield and rumored to be violent and bloodthirsty in Prince Ning's palace, secretly found Zheng Zheng's medical clinic after visiting famous doctors for an old injury to no avail. After some searching, Zheng Zheng came up with the words "craniotomy and decompression", which frightened Xiao Jing's secret guards into drawing their swords. But this cold-faced prince just stared at Zheng Zheng for a long time. The next day, a piece of paper conferring marriage was slapped down: Prince Ning's concubine must be Zheng Zheng. The whole court was in an uproar. The fiancée who broke off the engagement was dumbfounded, and the aunt was so angry that she threw the tea cup. On the wedding night, Zheng Zheng took care of the medicine box by himself and glanced coldly at the uncertain prince on the bed: "Since it is a flash marriage, let's establish the rules first - first, not to affect each other's work; second, each sleep in his own place and keep a safe distance." Xiao Jing's eyes were dark and he chuckled: "You know so much... Who are you?"