The Shadow, Lamont Cranston (Richard Derr) goes to New Orleans to investigate the death of a jazz man. Somehow, the death is mixed up with a Latin American country's exiled leader and a possible revolution. To combat the bad guys, The Shadow can make himself invisible (though the effect is somewhat ruined by the evil laughter he has to do at the same time for some reason) and control men's minds...
This actually was the pilot for a TV series about The Shadow who last appeared in films in the 1940s (though without any special powers). The pilot wasn't taken up so it was turned into a rather uneven film.
It is a decent enough B movie, well paced and with plenty of action, the story delving more into the mystic than earlier films where The Shadow was basically a bloke with a hat! Mark Daniels plays Cranston's spiritual guide Jogendra.