The Lone Wolf Michael Lanyard (Warren William) has a bet with his nemesis Inspector Crane (Thurston Hall) that he can't stay out of trouble. Naturally it doesn't take long for the Lone Wolf to get into strife (though to be fair it largely finds him). A gang has kidnapped the designer of some engraving plates owned by the US Treasury and plan to use him to beat the security and make off with the plates. The Lone Wolf is accused of murder by Crane (which the gang really did). The Lone Wolf and Jamison (Eric Blore) begin a chase across the country to catch the gang and prove the Lone Wolf's innocence.
A fine entry in the Lone Wolf series with the usual fast paced antics and interplay between the main characters. The story is interesting bringing in elements of train chase adventures, dark country house mysteries and some twists with the identities of the bad guys. The plot has some questionable elements but the film moves so quickly it doesn't really get bogged down by anything.