Alden "Bill" Carter III sees a beautiful woman, Jerry, dining alone at the Park Savoy in New York, and after a brief flirtation, introduces himself. After he entreats her to be his "mystery woman" to make his girl friend jealous, Jerry agrees to attend a reception that night with him at the Douglas home. This plays right into Jerry's plans, as she is a jewel thief who intends to steal the Douglas jewels with her cohorts, Uncle John and Jeff...

An American pilot with a top-secret invention is kidnapped by foreign agents.

"Teddy" Connor, a woman recently orphaned, leaves her uncle's Midwestern farm for Chicago, where she meets "lumber king" John Meade. John takes her in for a hot meal and sends her roses the next day. John is engaged to penniless society beauty Caroline Haig, who is in love with Rodney Bentley and is marrying John for his money. A jovial millionaire without a conscience, John orders his long-time employee, Tim Mathews, to report to Chicago from the lumber mills and announces he is leaving the lumber business for wheat. Although Tim insists they reforest their lumber lands, John ignores his plea. For laughs, John invites Teddy and Tim to his engagement party at Caroline's wealthy friend's estate. Teddy, realizing John is engaged to a woman who does not love him, drowns her tears in liquor and embarrasses Caroline.

Crooks plot to steal a payroll being shipped by air.

The second of a series of four features Monogram made based on the comic strip by Hal Forrest (Universal also used the strip characters in two serials), finds a movie company shooting a war picture at Three Points airport, with Tailspin Tommy Tompkins as a stunt pilot in the film. Tommy is incensed by the complete disregard for human life shown by the film's director, Sheehan, and quits. Sheehan gets a replacement pilot named Earl Martin, who is known as a reckless pilot who will try an aerial stunt for a thrill. He hand Tommy get into a fight when Martin takes Betty Lou Barnes for a ride in a plane that is practically falling apart.

"Tailspin Tommy" Tompkins and "Skeeter" Milligan are training young U. S. Army fliers for the newly-formed 'Sky Patrol,'a branch of the Army Reserves which operates along the borders and coast-lines, on the lookout for smugglers. Carter Meade, whose father is the Colonel in charge of the patrol, has a terror of firing guns and his father insists he conquer this fear. Tommy sends him out on patrol, on orders from Washington D. C., to stop any unfamiliar aircraft. Carter challenges an unmarked amphibian plane, which opens fire on him. Carter, afraid to shoot, bails out as his plane is shot down. Carter is missing, and Tommy and Skeeter are searching for him and the mysterious airplane.

A millionaire is found murdered in his apartment. Suspicion falls on a variety of suspects, including his fiancée and her parents, the butler, and a professional mentalist known as The Great Gambini.

A Doctor's Diary is told through the eyes of Dr. Dan Norris (John Trent), resident physician in a private hospital. In his search for a cure for spinal meningitis, Norris recklessly runs roughshod over the feelings of his colleagues. The doctor's older, wiser supervisor, Dr. Clem Driscoll (George Bancroft), tries to curb Norris' impatience, pointing out that nothing takes place overnight. Angrily, Norris accuses Driscoll of malpractice and is forced to resign from the clinic -- just when a meningitis epidemic breaks out.

When his father is murdered, erstwhile conman Nick Darrow asks the cops if he can go undercover to find the killers, and maybe even stop a crime ring that has been plaguing the police. The sister of another innocent victim joins him as they infiltrate the syndicate. Any wrong move could lead to instant death.

The three Morgan brothers, Glenn, Jim and Buddy are all air mail pilots. The plane flown by Jim is shot down by Hugh Jeffries for the money it carries. Another flight is made by Buddy followed by Jeffries intending to shoot him down also...