For some reason, the actors in this film, particularly Dan Duryea, found it necessary to speak as if they were in an amphitheater in "World for Ransom," a 1954 film directed by Robert Aldrich.
If I had to describe this film in one word, I'd say "loud."
Mike Callahan (Dan Duryea) is a good friend of Julian Marsh (Patric Knowles), and is also in love with Julian's wife Frennessy (Marian Carr), who met Julian while boyfriend Mike was away in the service.
Julian is up to something no good, and Mike promises Frennessy that he'll get him out of it and bring him home. Frennessy admits that she's unhappy with Julian, but that she won't be able to leave him and go off with Mike while he's in trouble.
Turns out Julian has involved himself with a man named Alex Pederas (Gene Lockhart), a bad guy, and is part of the kidnapping of a nuclear scientist, one of the three men in the world who know how to detonate the H bomb. They're planning on making some big money. Julian has made a mistake in driving a route where he is well known, and he's been photographed by a street photographer. So there's a panic to get the photo and the negative to cover his mistake.
Others on the board have said this is a template for "Kiss Me, Deadly" and that it also is reminiscent of "The Third Man." I see similar plot elements but that's about it. Comparing this to either film is a stretch.
A good start for Aldrich, who was still in his early career and uncredited for this film. I think he did the best he could given the material.