Insurance agent Walter Neff plots with attractive Phyllis Dietrichson to murder her husband. After the husband has been tricked into signing a double indemnity accident policy, they kill him to make it look like an accident.
Insurance investigator Barton Keyes doesn't believe it was an accident and pursues the case, linking Phyllis with everyone but his friend, Walter. Neff, meanwhile, is told by Dietrichson's daughter from a previous marriage that she believes that Phyllis killed her mother in order to marry her father. Neff suspects Phyllis of a double cross and he believes she has abandoned him for the younger man.
Fred MacMurray ... Walter Neff
Barbara Stanwyck ... Phyllis Dietrichson
Edward G. Robinson ... Barton Keyes
Porter Hall ... Mr. Jackson
Jean Heather ... Lola Dietrichson
Tom Powers ... Mr. Dietrichson
Byron Barr ... Nino Zachetti