Cao Xin went on a solo trip to Ruoshui City in the summer when she was 18 years old. Two months later, something happened to her family. Her father, a criminal police officer, and her mother were killed. Her younger brother, Cao Yang, survived, but she could not remember how she came back. Her summer trip was full of doubts. Despite the secret protection of the police, Cao Xin was still frightened every day and gradually cut off contact with the outside world. After graduation, apart from going to work, she played alone at home, painting and playing the piano alone, until a complaint from Ruoshui was placed in front of her. Stepping into the city of Ruoshui, the case that had been silent for 8 years finally took action. She also had to face a man named Ren Yi. She was attacked from three sides, including the criminal gang from 8 years ago, her biological parents, and Ren Yi, a man who was constantly monitoring her. Can Cao Xin solve these mysteries?