Due to the return of Ye Qiuyu in the Gu family fire, Zhang Shuman was accused. Zhang Shuman used his actions to prove his innocence, lured Ye Qiuyu to reveal the arson facts, and uncovered the true culprit of the fire

The film tells the story of Zhang Shuman, who had a seven-year marriage with Gu Xinchen. Due to the return of the key figure Ye Qiuyu in the Gu family fire and the accusations against Zhang Shuman, the film goes from proving that Zhang Shuman was the culprit who caused the fire seven years ago, to Zhang Shuman using his own actions to prove his innocence and lure Ye Qiuyu to reveal the fact of arson, and then completing the evidence chain, ultimately uncovering the true culprit of the fire. It expresses the great obstacles and difficulties that the female protagonist Zhang Shuman faces in order to uncover the mystery of her parents missing, spending a long time span to find evidence of the entire perpetrator's crime, and exposing the hypocrisy of the perpetrator. The difficulty of wearing masks is not easy, demonstrating the protagonist's persistent perseverance and tenacious will, promoting the protagonist's adherence to justice and truth, and firmly defending the ideological principles of the rule of law.