Bob Spaulding, a manly fellow, meets Dr. Rankin and his wife on the street while they are engaged in a violent tiff. The doctor is about to strike his wife when Bob interferes, incurring the resentment of the doctor. During the flurry Mrs. Rankin drops her card case. From a card inside he learns the address and goes there to return it. They meet, and it is a case of love at first sight; but she is a wife, and beyond his reach.