David Turner is a bachelor; Emma Bindley is a spinster. Fate brings about their meeting in a boarding house. Mrs. Butterfield, the boarding-house keeper, notices their mutual admiration. One day when Emma is out shopping, a tramp tries to seize her purse. At this moment David appears and strikes the man down. One evening Mrs. Butterfield receives a telegram announcing her brother's illness and asking her to come to him at once. She is obliged to leave and asks Emma to finish the game of checkers with David. The nest morning David is taken suddenly sick and unable to leave his room. Emma volunteers to nurse him. One day, after he is convalescent, she is giving him his medicine, and he takes hold of her hand and tells her that if he were not held by a vow he would say something that would surprise her. She pulls her hand from his and points to her badge as a member of the Man Haters' Club. Mrs. Butterfield, who has returned, enters the room and noticing that something interesting has been going on, asks for an explanation. David shows her a letter from his Bachelors' Club and Emma her badge. Mrs. Butterfield reminds them that there is a way out of the difficulty. It is a leap-year. Emma takes advantage of her privilege and David accepts her.