"Dragged reluctantly to an art tea by his pretty wife, Michael Dundas, the famous couturier who indulges a fancy for sleuthing on the side, meets a stranger in one of his own models who seems ill at ease. She is distinctly upset at sight of a picture of the sand dunes and coming out of a faint, mumbles words that puzzle and intrigue Michael. When this same Lydia Courney is murdered that same night, apparently on her way to see him, her strange...