Chan, in Paris for a reunion with friends from World War I, becomes involved in investigating the murder of a munitions manufacturer who was supplying arms to the enemy, even as the rising clouds of World War II force the city into nightly blackout status..

Out of work swing band maneuvers a gig working for a political campaign, by drawing in and entertaining prospective voters at rallies. The candidate is really a stooge for a corrupt political machine, which discovers the band's handsome and appealing singer would make a better stooge. Meanwhile, romance blossoms between the band's singers. When election day approaches, the band's singer wants out of the campaign, but the machine threatens to smear him and his pals in the band if he quits.

A man involved in a crime (Nolan) kills his key witness by mistake and resigns himself to death. He changes his name so as not to harm his family. The law is not content with his explanation, however.

A family loses its collective head going from rags to riches in this low-budget comedy from also-ran studio Chesterfield. Former slapstick comedian Andy Clyde starred as Grandpa Tom Hopkins who, after selling his junk business, moves in with daughter Molly (Lucille Gleason), her husband Ed (Roger Imhof), and their children Mary (Ann Doran), Edna (Paula Stone), George (Ben Alexander, and Willie (Frank Coghlan Jr.). Ed, who is a member of the town lodge "the Whales," is persuaded by Whitney (Sam Flint) the "Grand Harpoon," to buy $5,000 worth of shares in a promising gold mine, mortgaging the family home to do so. Soon the family is rich and everyone except Molly takes on airs.

Racketeer Jim Barnes is trying to force the independent taxicab-drivers to join his "protection service" at the cost of five bucks a day. Champion race-car driver, Bob Kane, joins with his friends Lee and "Dad" Martin in a fight for the street rights of a big city.

When a friend of Charlie's is found kicked to death by his own race horse on board a Honolulu-bound liner, the detective discovers foul play and uncovers an international gambling ring.

Allen Colby, heir to a huge fortune, is presumed drowned after an ocean liner sinks off the coast of Honolulu. Mysteriously, Colby reappears at his mansion only to be murdered soon after. When his body is discovered during a seance, everyone in attendance becomes a suspect, and it's up to Chan to find the murderer before he or she strikes again.

Songwriters Calhoun and Harrigan get Katie and Lily Blane to introduce a new one. Lily goes to England, and Katy joins her after the boys give a new song to Nora Bayes. All are reunited when the boys, now in the army, show up in England.

Katharine Hilliard, mousy dean of a stuffy music school, meets and is insulted by swing band leader Barry Clayton on a train. To "show" him she takes a friend's advice, removes her glasses, and puts on a designer gown. Naturally, she becomes gorgeous. Soon, both Barry and crooner Jimmy Hale are after her, and she finds herself in the midst of triangles and misunderstandings.

When Hollywood film studios reject her because she's too young, an Arkansas woman sets out to build a career as an actress on her own.