The work revolves around the protagonist Ru Meng, who has a childhood relationship with Ouyang Xin. While waiting for Ouyang Xin to return from the imperial examination, Ruyan and her go to see the results and learn that Ouyang Xin is the top scorer in high school. During the date, Ouyang Xin stabbed Ruyan to death in order to marry the princess. Rumeng lived as her younger sister, and finally found out that everything was an illusion of her sinking into the water.
