In her family, the girl Lin Wanwan faces her mother's excessive preference for a pet cat, as well as the deception and exploitation of outsiders. She bravely stands up, gathers evidence, exposes the truth, and makes the wrongdoers subject to legal sanctions. The mother also bears corresponding responsibility. In the end, Lin Wanwan lets go of the past and independently starts a new life. The story conveys themes of courage, growth, and self-redemption.