Mr. J. G. Reeder is called in by the Bank of England to investigate a gang of forgers. Reeder enlists the aid of a younger man, Captain Johnnie Gray, to infiltrate the gang by going undercover in Dartmoor jail.
The Monthly Film Bulletin wrote: "The plot has vigour but it is clumsy, slovenly and frankly impossible. ... But the film has many merits; it moves quickly, in general is very well acted, has really humorous interludes, and good clear sound and photography."[5]
Kine Weekly wrote: "The acting is in the main good, and powerful suspense accompanies the climax, but the story is far from easy to follow. There is, however plenty of active and exciting surface interest to keep the masses on tenterhooks."[6]
Picturegoer wrote: "The plot is very involved in this adaptation of an Edgar Wallace thriller and militates against the picture's entertainment. ... Sally Gray is adequate as the heroine and Gibb McLaughlin is good in the title role, but the rest of the cast is hindered by the story development."[7]
Britmovie wrote, "Director Norman Lee keeps things moving along briskly and packs plenty of goings-on into its relatively short running time, but the outlandish plot requires some suspension of disbelief."[8]