Lin Xiarand holds a law license but faces workplace discrimination due to her age and having a child. She encounters Mother Liu seeking help, whose son was driven to death by the Four Evils Gang. Lin Xiarand takes the case but mistakenly identifies Fu Huaian, the CEO of the Sihai Group, as the gangster boss Fu, and resolves to go undercover. She disguises herself to approach Fu Huaian at a restaurant. Just as Fu Huaian's ex-girlfriend causes a scene, Lin Xiarand gets injured protecting a voice recorder. Moved, Fu Huaian proposes marriage, and Lin Xiarand agrees to a flash marriage in order to investigate the case.