A young woman (Rosemary Wilcox) is haunted by pop-Freudian dreams of her recently murdered psychologist (and lover), so for some reason she goes to a resort where the psychologist liked to hang out and becomes involved with a gangster (Adolf Celli) and the strange female resort owner (Alida Valli). Soon more murders occur involving the other guests at the resort.。Marple is asked by her lawyer, Christian Gilbranson, to visit his step-mother, Carrie Louise Serrocold, an old friend of Miss Marple's, at her country estate. Carrie's husband, Lewis, confides to Miss Marple that he suspects someone is slowly poisoning his wife, and when Gilbranson visits the mansion, he is mysteriously murdered.。