Dr. William Beaumont, through the chance opportunity offered to study the action of the digestive processes in the exposed stomach of a French-Canadian patient he was treating in his own house, made -- in 1833 -- an exhaustive study and published his findings, which even today have been proved so sound that little new has been added. This is his story, -- the story of his spirit of adventure and desire for new fields which led him to leave his farm home as a youth, to venture to northern Vermont and New York, to study under a physician -- and to take a post as army surgeon. Frontier post life -- and eventual absorption in this lengthy experiment -- brought him fame. Genevieve is at her best in the story aspects of his youth; the scientific aspects drag at times.