Mrs. Lucy Carelton, who comes from one of the wealthiest and most prominent families in 1880s New York City, has been completely undone by her nerves. Her ambitious husband, a nouveau riche stockbroker, drags her from one doctor to another in search of a cure that will allow her to fulfill her many social obligations without giving in to hysteria. They think they have found the solution in charismatic neurologist Victor Seth, a champion of a relatively new procedure called hypnotism. Seth sets about freeing Lucy from the social constraints that have made her so unhappy, encouraging her to pursue her artistic talents and explore her sexuality. Seth convinces himself that his techniques, including his handy way with an electrotherapy wand, are all in the name of science, but even he is unprepared for the new Lucy who emerges--a passionate, calculating, amoral creature of large appetites.