Dennis O'Keefe can't stomach defending men he knows to be guilty, so he joins D. A. Adolphe Menjou's office. His boss is pleased with his work until he loses a case. Menjou thinks his mind isn't on his business, so he investigates and discovers O'Keefe is in live with Marguerite Chapman. She was tried for murder in Kansas City, but beat the rap. Menjou thinks she did it, and sends O'Keefe to Italy to get a witness. While he's gone, Miss Chapman marries her boss and the local mob's, George Coulouris. O'Keefe returns, finds out what happened, and quits.
It all runs back to Phillips Lord's radio series of the same name, and with an involved and noirish plot, this runs along pretty well. A good part of that can be attributed to the cast, which includes Michael O'Shea, Jeff Donnell, Steve Geray, and Ralph Morgan. Although as a mystery it's no great shakes, the fast pace keeps things interesting.