Xu Chuan, a student at Yizhuan, unexpectedly awakens a special ability to perceive the colors of emotions. By chance, he gets to know Xu Wanxing, a top student trapped in psychological dilemmas and hopeless about life. Seeing the girl burdened by past pains, Xu Chuan uses sincere companionship and gentle protection to turn into a faint light, gradually dispelling the haze in her heart and encouraging her to face life directly. Just as the two of them are slowly walking out of the low point, Xu Chuan discovers that the root cause crushing Xu Wanxing comes from anonymous online verbal abuse. Holding fast to the belief in justice, they run together toward their bright future.