The Manster

American foreign news correspondent Larry Stanford (Dyneley) has been working out of Japan for the last few years, to the detriment of his marriage. His last assignment before returning to his wife in the United States is an interview with the renowned but reclusive scientist Dr. Robert Suzuki (Tetsu Nakamura), who lives atop a volcanic mountain. During the brief interview, Dr. Suzuki amiably discusses his work on evolution caused by sporadic cosmic rays in the atmosphere, and professes that he has discovered a method for producing evolutionary change by chemical means. Suzuki serves Larry a drugged libation, causing him to fall into a deep sleep. Announcing to Tara (Terri Zimmern), his voluptuous assistant, that Larry is the perfect candidate for his latest evolutionary experiments, he injects an unknown substance into Larry's shoulder. Upon waking, Larry is oblivious to the true situation and accepts Suzuki's invitation to spend the next week vacationing with him around Japan. Over the next few days, Suzuki uses Tara as a beguiling distraction while conditioning Larry with mineral baths and copious amounts of alcohol, exacerbating the pain in Larry's shoulder.