G-Man Jeff Crane poses as a crook to infiltrate the notorious Purple Gang, a band of hoodlums which preys upon other hoodlums. Orchestrating the jailbreak of the gang's leader, Crane joins him in a Dillinger-like flight across the country.
An American serviceman stationed in Tokyo, who's engaged to a local singer, faces both a military court-martial and a trial in the Japanese courts after an accidental shooting in which a teenager is killed.
Charlie is hired to deliver a pearl necklace to a millionaire at his ranch. When murder intervenes he disguises himself as a Chinese servant and begins sleuthing.
In the early 1900s, as the Panama Canal is being built, a group of doctors try to discover a cure for yellow fever, a disease that is decimating the workers constructing the canal.
