Chen Jianxia, a girl who lived in a patriarchal environment since she was a child, longs to escape from the oppressive family. She is admitted to Zhenhua Middle School, where she meets the rebellious but kind-hearted boy Li Ran. Li Ran becomes the only light in her life. She is like a forgotten spaceship in the universe, and he is the only answer in the radio that has been silent for many years.