When she was seven years old, she was the spoiled demon king of the Xun family who was running rampant and causing trouble in the countryside. When he was nine years old, he was a proton who was forced to stay in Mingzhao. When he was crying, he was busy saying that if you cry again, he would beat you; ten years later, at the age of seventeen, she would be the general "Smiling Yama" who shocked Mobei, and at the age of nineteen, he would be the handsome dandy "Mr. Haoyue" who went to Beijing. The red thread of an assassination mission is tightly tied, and there are also hidden secrets. Are the two competing people enemies or friends?