Alice Barlow (Marie Wright) is murdered by an unknown man, who then ransacks her house, looking for her valuable and famous rubies. The house remains empty for years, until newlyweds Paul and Bella Mallen move in. Bella (Diana Wynyard) soon finds herself misplacing small objects; and, before long, Paul (Anton Walbrook) has her believing she is losing her sanity. B. G. Rough (Frank Pettingell), a former detective involved in the original murder investigation, immediately suspects him of Alice Barlow's murder.