Bai Jingyao awakens the ability to see spirits after an accident, setting out on an extraordinary journey. She travels between the worlds of yin and yang, helping lingering souls fulfill their wishes and maintain the balance. Faced with complicated conflicts, she and like-minded companions form the "Guardians of Yin and Yang," writing a legend with love and courage. This novel blends fantasy, adventure, and an exploration of human nature, revealing the miracles and dignity of life.