When she was twelve, Jiang Wan rescued Zhou Yubai and his younger sister, Jiang Tang, from a devastating flood. The prolonged lack of oxygen left her with permanent damage, forcing her to depend on a mechanical heart and an external power supply to survive. Years later, during a typhoon that plunged the entire city into darkness, Zhou Yubai took away her only backup power supply to save Jiang Tang's tropical fish, leaving Jiang Wan alone at home. She died as a result. Reborn in the body of another girl with the same name who had been injured in a car accident, Jiang Wan now has a healthy heart and finds a loving family and a devoted fiancé, Xiao Qi. Still haunted by the past, Zhou Yubai unexpectedly encounters the reborn Jiang Wan and desperately wants to make amends. But Jiang Wan is determined to leave the past behind. Everyone connected to her previous life eventually faces their own fate, while she finds protection, love, and the happiness she deserves in her new life.