Andy Hardy, now a grown man with a wife and children, returns to his hometown on a business trip and finds himself getting mixed up in local politics.

A varied group of immigrants head for the USA aboard S.S. Mauronia, including Russians Sascha, Mischa, Toscha, and Olga. Sascha has fallen for Scots lassie Heather; Olga is courted by Chris Jansen, valet of first class passenger Larry Beaumont. Heather catches Larry's eye, to the discomfiture of Larry's other flame Diana. On arrival, Heather has immigration trouble, and a variety of complications ensue…

The LaFontanne Chemical Company is shipping out a load of we're not sure what, disguised as something entirely different. Mr. Pereaux and Mr. Grock don't want that shipment to ever arrive anywhere, and they and a man named Aquirre mean to stop it at any cost. The ship's owner, Mr. Fontanne, smells a large rat and calls Chan in on the case, since the famous detective is in New Orleans because, well, because he felt like being in New Orleans, I guess. Chan gets what facts there are from LaFontanne, who is promply set upon by a gang who attempt to kidnap him, but fail.

A singing waiter gets into an argument with some obnoxious customers and winds up knocking them out. The incident is witnessed by a shady boxing promoter who sees an opportunity to cash in and pretty soon the waiter is being promoted as "Kid Nightingale, The Singing Boxer".

Johanna Parry, a quiet caregiver, starts a new job working for an elderly Mr. McCauley and his teenage granddaughter Sabitha.

A bank teller attempts to clear his name and rebuild his career after he is wrongly accused of theft.

Alpha's been raised along scientific principles, and will make Mike Regan a great human interest story for his paper. But when his interview prompts Alpha to run away from the institute and ask him to show her some magic, Mike gets more responsibility than he bargained for. Especially since another story of his, one involving gangsters, has also come home to roost.

An American OSS agent and the French underground attempt to rescue a Nazi general, who is awaiting execution by the Germans, and help him escape to London.