On a Clear Day You Can See Forever follows Dr. Mark Bruckner, a handsome psychiatrist and professor who is still in love with his late wife. When Bruckner treats David Gamble, a quirky young florists' assistant, Bruckner puts Gamble under hypnosis to help him quit smoking so the young man can move in with his perfect boyfriend, Warren. During their session Bruckner stumbles upon what he believes to be Gamble's former self, a dazzling and self-possessed 1940s jazz singer named Melinda Wells. Bruckner is instantly smitten by Melinda and pursues a love affair with the woman, who's from another time and place and who may have never even existed.