Married for 22 years, Mary Emerson treats her husband, John, more like a son than a husband. He is stung by her rebuffs and, therefore, succumbs to the youthful charms of Gloria Sanderson, whom he meets on a business trip. But just after he mails a letter to Mary telling her that he will not return, John finds Gloria in the arms of her fiancé. Realizing his foolishness, he races to the train in an effort to retrieve the letter. He fails, and Mary receives and reads the letter; but she too has seen her error, conceals her knowledge of the letter's contents, and accepts John's professions of love.