The Spy Ring (1938)

Plotters Gamble Death for Anti-Aircraft Secrets!

Two American-army officers are working on a new type of machine-gun for anti-aircraft warfare, when one of them is murdered. The other vows to get the spies that are after the invention and avenge his friend's death.

Genres: Adventure, Crime, Drama, Mystery, Romance

Stars: William Hall, Jane Wyman, Esther Ralston, Robert Warwick, Leon Ames