The author is a cynical, somewhat overbearing man who has a very poor idea of woman. There are times when the one woman nearly makes him alter his mind, but she, although she treasures a secret love for him, is chilled by the opinion she knows that he holds of her and her sex. One night at a Bohemian gathering, the author, in the course of an argument, makes a wager with a friend who champions the women's cause. The author with a smile, states that he has a test that no woman can withstand. The author has a cigarette box in which he keeps his own cigarettes, which bear his monogram. He empties the box and fills it with smoke and his friend manages to leave the box in the presence of a woman, making some remark about it as he goes. The first woman "falls," the second woman "falls" also. She however, seeking to cover the humiliation and annoyance, fills the box with pipe smoke, but the author quickly detects the imposition and is more cynical than ever. For the third test the friend selects "the woman," and the anther finds himself hoping that she will not fall like the others. She does not open the box; she is not of the curious kind. But the second woman tells her that a trap has been laid for her, and she opens it. When the smoke comes out, she knows what has happened. During the evening she picks up a cigarette which the author has laid down. She places it in her dress. She later smokes the cigarette and fills the box with the smoke. The author detects the smoke of his brand of cigarettes. He goes to her and congratulates her. She feels that she cannot lie to him and tells him the truth. The author tells his friend, who gives him a lecture. He tells him that here is a woman who is worthwhile; one who was brave enough to err and confess. The author thinks it out, goes to the girl, and the cynic is lost in the lover.
—Moving Picture World synopsis