From birth, Zuishan was a mentally retarded child, but she was Zuitian's only relative. Unexpectedly, when she was 5 years old, Zuishan died in a car accident, and Zuitian always blamed himself. Seventeen years later, the appearance of Yishuang changed her life. Yishuang was a gift given to Zuitian by the Holy Mother. It was endowed with spirituality and helped her to make a huge difference in the workplace.