Shanghai is known as the Magic City. On a rainy day of a certain year and a certain day, a man and a cat met in the magical city, and they became a father and daughter. They cried together, laughed together, talked about their ideals, and talked about life together. The cat believes that the place where the father is is home; the father believes that the place where the daughter is is home. They agreed that they would never separate and live happily together.