A psychiatrist, Dr. Susan Lane, is leaving a military hospital after spending two weeks working with patients there. Before she leaves, she encounters a patient reading a comic strip by Michael Kent. The comic's character, ''the Nixie'', encourages people to act on their impulses by whistling in their ear. Dr. Lane explains to the patient that it's not good to act on their impulses. Colonel Brady, another psychiatrist, mentions to Dr. Lane that her confidence as a professional comes from some problem that she has repressed.