Through memory flashbacks accessed by hypnotic regression, depicts the alleged UFO abduction of Betty and Barney Hill on September 19, 1961 in the White Mountains of New Hampshire. Upon returning from a trip into Canada, Betty (a social services worker in Portsmouth, New Hampshire) and Barney (a postal employee in Boston) are plagued by crippling anxiety and nightmarish visions. Turning to Dr. Benjamin Simon for help in piecing together the happenings of that night, the Hills enter into therapy and independently relate a most unearthly tale.