Su Yuan's true story prototype: Na Ying, a Korean girl who was only eight years old at that time, was violated by the criminal Zhao Douchun and suffered great physical and mental harm. Now Na Ying is twenty years old. Although she survived, this incident left a very big psychological shadow on her. In recent years, Na Ying has tried to commit suicide many times, and she has been receiving psychotherapy. Although Na Ying's body gradually recovered, her psychological damage could never be erased.

In the movie, the little girl Su Yuan is kind and lovely. Once Su Yuan went to school by herself, and it rained on the road. Su Yuan met a middle-aged man with an umbrella. The middle-aged man blocked Su Yuan's way and asked her if she could open an umbrella together. Su Yuan agreed when she saw that the middle-aged man was wet by the rain and looked miserable. Unexpectedly, this is the beginning of Su Yuan's nightmare.

Su Yuan was dragged to an abandoned factory by him and committed atrocities. Not only that, he also hurt Su Yuan's body. When the police found Su Yuan, everyone couldn't bear to watch, because Su Yuan was really hurt so badly that Su Yuan's family was heartbroken. Su Yuan was hurt since she was a child, and she kept asking herself if she had done something wrong, which made people very sad. Finally, the criminal who hurt Su Yuan was arrested, and Su Yuan's body is gradually recovering, but this matter will become a lifelong pain in her heart and will never be erased.