When I was young and reckless, my soul inadvertently crossed into another person, unintentionally altering the course of the world. Thus, I swore never to use my supernatural abilities again. However, in order to save the life of my critically ill younger sister, I had to break that vow. I used my powers on the nurse, Jinzhi, who was taking care of my sister, and crossed over to Jinzhi's childhood to play her role and experience her life. Through this, I discovered that beneath Jinzhi's gentle and elegant facade, there lay dark and mysterious secrets...