The film opens with Florence Cole, the wife of local doctor Julian Cole, handing over money to a man in a mask. When she returns home, Peter Hastings, with whom she is romantically involved, telephones Dr. Cole to say that he and his friend Madeline Tilliard have been poisoned by strychnine in their drinks. Madeline dies. Peter recovers, and is suspected of Madeline's murder.
At Peter's house, Dr Cole finds love letters between Florance and Peter, which confirm his suspicions of an affaire.
Florence tells local reporter Dennis Willows that Madeline and an unknown man were blackmailing her. That night Florence takes another payment to the man in mask. She tells the man she recognises him. He strikes her and she falls and dies. Peter's ex-fiancée Sallie sets out to find the male blackmailer.
The Monthly Film Bulletin wrote: "An unpretentious mystery story which begins slowly but works up to an unexpected and effective climax. Character drawing is fair, with a reliable performance by Russell Napier as the police inspector, and there are a few tense moments."[3]
Kine Weekly wrote: "Tin-pot British whodunnit ...leading and supporting characters, taken from stock only lightly dusted, are clumsily drawn and deployed. Lack of finesse robs it of surprise and suspense, and it slowly peters out."[4]
In British Sound Films: The Studio Years 1928–1959David Quinlan rated the film as "average", writing: "Complex thriller is very average, but does muster a few moments of tension."[5]
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