Four years ago, Song Yun's son Xiao Jing was killed. She brought Lin Qianqian to court. Her husband Gu Huaichen testified she murdered, and Lin Qianqian was acquitted. Song Yun served four years in prison. Released, she confronted Gu Huaichen, who suspected Xiao Jing was not his. Devastated, Song Yun jumped off a cliff. Gu Huaichen learned Lin Qianqian caused misunderstandings. He searched for Song Yun, but she had started a new life.