In this drama, based on the H.G. Wells novel, Mary (Ann Todd) longs for Steven (Trevor Howard), a lover she turned down years ago. Later, Mary is married to Howard (Claude Rains), but meets up with Steven while on vacation in the Swiss Alps. A seemingly platonic encounter fueled by pent-up passion leads to an affair between Mary and Steven, and she must choose between the two men -- the husband who loves her and the now-married man she rejected years earlier.