Following a long investigation, Police Detective-Lieutenant Anthony "Tony" Roberts becomes convinced that there is some powerful unknown-master-mind leader behind the gangs of crooks who are terrorizing the city, and it has something to do with paroled convicts. He sets up a scheme with his supervisor to have himself shamed by being demoted to a patrolman and then caught in the act of receiving bribe-money from a racketeer. He is convicted and sent to prison, and the manner in which his parole is arranged leads him, dangerously, to the secret-head of the gang.

The small-town prudes of Lynnfield are up in arms over 'The Sinner,' a sexy best-seller. They little suspect that author 'Caroline Adams' is really Theodora Lynn, scion of the town's leading family. Michael Grant, devil-may-care book jacket illustrator, penetrates Theodora's incognito and sets out to 'free her' from Lynnfield against her will. But Michael has a secret too, and gets a taste of his own medicine.

Carny con artist and snake-oil salesman Eustace McGargle tries to stay one step ahead of the sheriff but is completely devoted to his beloved daughter Poppy.

When Paul Madvig, a successful politician who fights his rivals to seize the city, becomes implicated in a murder, Ed Beaumont, his friend and right-hand man, must decide which side he is on.

Mickey Lofton, young half-brother of famed war-aviator Jerry, fails in his attempt to enter the Canadian Air Corps, because of his fear of thunderstorms developed by an incident in his boyhood days. Jerry, now a Captain in the U.S. Department of Justice, is given an assignment to capture some border oil smugglers. Through his friendship with Raoul McGuire, one of the suspects, Jerry is accepted as a member of the gang. Mickey is in love with Raoul's sister, Molly. Gang leader Moran shoots and wounds Raoul, and is himself shot down by Jerry. Mickey flies Molly and her wounded brother to a hospital. Jerry takes off in another plane to guard Mickey's craft from a pursuing airplane, and crashes his plane into the gangster's plane but parachutes to safety.

Johnny Fraser leaves his mother in their small home town and sets out for the big city. He obtains a job with a large firm of architects. Steve Carson, a fellow employee, is constantly flaunting the money he has won at the race track. Johnny also bets the races, but loses heavily and takes some of the firm's money to cover his losses.

This drama chronicles the education of a naive, rich young woman who inherits a steel mill. To help her keep it running she unites with a man. Meanwhile two crooks try to destroy her production in order to force her to sell it to them for very little money. They are thwarted at the last moment.

Royal Canadian Mounted Police Sergeant King protects a girl who has come to claim a mine left by her father. An evil lawyer plans to keep the mine for himself.

Desperate for work, Johnny Barclay leaves Ma and Grandpop to join the newly formed Civilian Conversation Corps. On the way he meets cynical young hobo Roscoe "Rockie" Johnson, and, although Rockie believes that hopping freight trains is a great life, Johnny convinces him to join the Corps.

A feud between taxicab companies forms the basis of this drama. The trouble begins when the hero is double-crossed and framed for a murder by his rival with whom he was competing for the position of fleet superintendent in the city's biggest cab company.