Yin Yin was the newly appointed Head Mistress in charge of guarding children that had unfortunate lives in many worlds. Her task was to protect them until they grew up safely. However, she found that more and more parents were becoming irresponsible in raising their children. They didn’t pay attention to the well-being of their children, resulting in them experiencing a miserable life. Seeing the hardships of these pitiful children, Yin Yin finally made a decision to come down personally and become their mother.