Bob Day has been captured by Marlow's gang. When Tim Barton and sidekick Monte come looking for him, Tim is also captured. Escaping, Tim has a plan that will have the outlaws fighting among themselves.
Robert Castleback is in possession of secret papers which could bring a certain prince to power under conditions which would make Castleback a ruling force in Europe. Master crook Arsene Lupin becomes aware of Castleback's bid for power and, in the interests of France, begins a search for the plans.
Joan Bannister is the wife of globe-trotting war correspondent David Bannister. Returning to the US, Bannister becomes suspicious when Joan begins keeping company with known Nazi functionaries, notably the sinister Mr. Peter. Suspecting that his own wife may be the elusive “Madame Spy” wanted...
William H. Thompson plays a likeable old lighthouse keeper who must contend with his less likeable fellow villagers. One of Thompson's acts of kindness is to bless the "scandalous" romance between hero and heroine.
Wee Lady Betty rules the O'Reilly castle with a stern hand and a big heart until she learns that Roger, the O'Reilly heir, is coming to take possession of his estate. Unable to provide for her aged father, Betty conceives of a scheme. Feigning to leave the castle, she returns after dark with her...