Sarah Garnell (Shelley Winters) is a middle-aged wife and mother whose lover, the young director of the local little theater, Fred Linden (Ray Danton), is supposedly separated from his wife. Her husband, Frank (Harold J. Stone), thinks all is well. When she is interviewed, she classifies their sexual relationship as “tolerable”. They have sex every Saturday. She describes her affair, weeping. The subsequent questions make her think for the first time about the future, and she eventually decides to leave her husband. She leaves a note and her wedding ring for Frank and goes to Fred's boat to find Fred's wife, waiting. Fred won't see her. Sarah goes back to her stricken husband, who tells her that he meant “for better or for worse” and returns her ring.