There are two girls in Jiangcheng No. 1 Middle School. One is Li Xue, who is always number one, as cold as the moonlight; the other is Wang Meng, who is struggling in the middle, working as hard as a weed. On the eve of the college entrance examination, when Wang Meng's efforts were overwhelmed by the pressure, it was the wrong question book filled with encouragement written by Li Xue that illuminated her youth when she had almost given up. This is not a story about a genius saving mortals, but a two-way journey in which two souls support each other and illuminate each other in a sea of questions and tears. It turns out that the warmest light is hidden in the wrong question book we wrote together.