Suspicion falls on widower David Farrar and his pert young mistress (Geraldine Fitzgerald) when his sickly, shrewish wife dies of arsenic poisoning. Veteran director Maurice Elvey creates a nicely ominous atmosphere as the ghostly influence of the dead woman seems to pit the lovers against one another, but the middle act, in which Farrar and Fitzgerald grow increasingly suspicious of the other's possible motive for murder, tends to drag. Roland Culver as a dogged, no-nonsense Scotland Yard detective livens things up considerably.