Max discovers that in the same apartment house with him lives a most charming woman doctor. To meet her he fakes a sickness and calls upon her for professional advice. She thumps him, puts her little ear down to his chest, diagnoses his case and prescribes for him. Max departs so full of happiness that he finds difficulty in walking as a sober man should. The days pass and, winning the lady's love, Max becomes married to her. On the wedding night just as they have reached the seclusion of their own room and Max has started to pour out his rapture into her willing ear, the servant hammers at their door. They find that the bride is called out upon a case, so in wedding gown and orange blossoms she leaves the despondent Max to await her return. The time passes and finally she returns, but only for a moment. The servant raps at the door again, and again she must go out to see a patient. The unhappy bridegroom protests in vain. He is sleeping uneasily in his chair when she finally comes back. As they are embracing, the servant raps at the door again, announcing another call for the doctor. The now infuriated Max rushes upon the disturber of his happiness, throws him out of the room and locks the door. A year later the happy husband, bearing a baby in his arms, wanders into the reception room of his wife's office. He finds it filled with waiting patients, all men. He steps into the office and sees the wife of his bosom, with her head at a man's chest listening to his heart. Filled with rage he deposits the baby in the arms of the man nearest him and proceeds to drive every patient out of the house. Thus he is convinced that from henceforth his wife must cease to be an "M.D." and become more of a wife and mother.