When Audrey Bedford is released from prison, she finds herself embroiled with mysterious doctors, missing heirs, diamonds and murder. Her step-sister has dubious motives for letting her stay with her, an employer wants to pay her to work for somebody else, and a detective, convinced that she was wrongly convicted, tries despite her protests to protect her from further trouble.
The Monthly Film Bulletin wrote: "As intriguing as most films featuring an apparently maimed, shaggy and faceless recluse holed up in a derelict house, The Malpas Mystery grips because a sparkling pace manages to conceal most of its narrative shortcomings. Slightly above the average of Merton Park's recent Edgar Wallace adaptations, it is competently made [and] maintains its air of mystery."[5]
Kine Weekly wrote: "Intriguing mystery melodrama. ... The plot is a tangled skein, but the cast and drirector quickly unravel it in circumstances that furnish all round lively entertainment."[6]
Variety said: "Very complicated plot, involving jewel thieves and the reunion of a father with a long-lost daughter can be followed if attention is paid. Maureen Swanson makes an appealing heroine, her vulnerability adding to the suspense."[7]