Chester is engaged to Grace. He had just received a letter at his office from Laura Gaines the sister of a chum of his. The letter was on two sheets asking Chester on the first sheet to help her in a business deal and arranging for an appointment on the second sheet, which bore her signature. Chester knocks this last sheet off his desk. Grace visits him and finds the compromising paper. She goes home. Chester telephones her that important business will keep him away that evening. She waxes suspicious and calls up Finder and Pinchem Detective Agency. They assign Pearl, the girl detective to the case. She trails Chester and reports to Grace that he dines at a hotel with a woman. She then goes to Chester’s office and gets a job there as stenographer. The next day Chester gets a letter from Miss Gaines, asking him to meet her again. Pearl gets the letter and immediately takes it to Grace. Grace, when Chester calls that evening is very cold to him and he is at a loss to understand. Pearl believing her mission accomplished, wants to resign from her job, but Chester won’t let her. Grace, sorry for the way she treated Chester, decides to call at his office. However, Pearl and Chester have grown very fond of each other and when Grace calls they are in each other’s arms. Grace is angry and gives Chester back his ring. He gives it to Pearl. Grace goes around to the detective office to complain about Pearl, and Pearl, who is there, resigning, submits her bill, which is $2. Chester meanwhile has discovered Pearl’s real identity by finding her notebook, but when she confesses his heart goes out to her and all is well.