Through reincarnation, Chu Xing returns to the eve of the car accident twenty years ago that changed his fate. In his previous life, guilt consumed him for twenty years. Believing he had caused the death of top student Xu Jingjing, he was trapped in nightmares and self-torment. Reborn, he uncovers the truth behind the tragedy and stops Xu Jingjing, who is determined to take her own life, right in front of everyone, slapping some sense into the stubborn girl. He clutches her farewell letter, keeps her close and under his watch, and forcefully becomes part of her youth. As he tears away the hypocritical masks of those around them, he also saves her from despair and rewrites the fate that left them both with regrets.