This novel revolves around Su Ruanruan's thrilling experience of being imprisoned. Su Ruanruan was inexplicably imprisoned by Fu Yichen in the basement of Fu's old house and tortured. While struggling to survive, she found that she was being used as a substitute because she looked exactly like Fu Yichen's childhood girl next door, Lin Yue.
Su Ruanruan continued to search for clues in the prison, from hidden photo albums, mysterious notes, to conversations with servants, and then ventured into the study to find Fu Yichen's diary recording his obsession with Lin Yue. She was getting closer to the truth step by step, and she was constantly in conflict with Fu Yichen. In the future, Su Ruanruan will use the diary as a bargaining chip to start a difficult contest with Fu Yichen, and the direction of the story is full of unknowns.
