The resolute and resolute female detective Shen Bing, in order to track down the border arms smuggling case that led to the death of her best friend from the police academy, reached a "contracted marriage" with Lu Zhanxiao, the special forces commander of the unit involved, and conducted in-depth investigations as a military wife. She originally wanted to use this relationship to get closer to the truth, but was gradually moved by Lu Zhanxiao's passion, responsibility and silent protection. However, the core clues in the case point to the key figure behind the scenes, who was her ex-boyfriend Gu Yuan, who abandoned her due to low self-esteem in college and has now become a successful businessman. Gu Yuan approaches again with deep affection and regret, trying to use old feelings to shake Shen Bing while covering up his crimes. Shen Bing struggles between the heartless disguise of his "old love" and the sincerity of his "new husband". At the same time, he faces obstacles from internal investigations and threats from criminal groups. In the end, she stood up for justice, fought side by side with Lu Zhanxiao, exposed Gu Yuan's true face, completed the transformation from contracted marriage to true love, and achieved personal growth and emotional redemption.
