Recently pregnant Vivien Harmon is undergoing an examination by her OB/GYN, Dr. Day, who is trying to convince her to take hormones to increase her sex drive. She refuses, explaining her suspicion that her lack of drive might be a symptom of depression and alludes to her recent stillborn baby. Vivien returns home and is alarmed by noises coming from upstairs. Believing that there is an intruder, she dials 911. Vivien arms herself with a kitchen knife and sneaks upstairs, and discovers that her husband, psychiatrist Ben, is having an affair with one of his students.