Bud Corliss (Robert Wagner) is having trouble being accepted by the family of his comparatively-rich girlfriend, Dorothy Kingship (Joanne Woodward). Dorothy's pregnancy is only going to make matters worse. Instead of working their problems out, however, Bud coldly murders Dorothy and leaves false evidence that she committed suicide. When Dorothy's sister Ellen (Virginia Leith) decides to look into the death, Bud begins to wonder if he wont have to kill again.