In this hot summer, 16-year-old Su Chenrui was wandering aimlessly under the French plane tree. She came from a single-parent family, and her mother passed away when she was very young. The children always laughed at her for being a child without a mother who cared about her, but she would not be sad because she believed that her mother must be somewhere. It falls on the viewer herself, so she will not make her mother sad. Whenever a child laughs at her, she will stand up and resist. From then on, she knows that she must become very strong, so that no one will bully her. She will not let others bully her, because she is a strong girl!