Exploits of the Postal Inspection Service furnish Alan Ladd with a good cops-and- robbers actioner. Film deals with government detectives tracking down the killers of a fellow postal inspector and preventing a million-dollar mail robbery. Ladd is right at home as the tightlipped, tough inspector assigned to the case. There is a neat contrasting byplay in the nun character done by Phyllis Calvert as co-star, which adds an offbeat note to the meller plot.
While investigating the murder of an inspector, Ladd comes across a plot to loot the mails of a large cash shipment during transfer from one railway station to another. He sets himself up as a cop who can be bribed by demanding money from the gang on threat of spilling the robbery plans.
Calvert’s character figures importantly as she is the only witness who can tie the gang to the original murder. Paul Stewart dominates the crooks, with capable assists on menace from Jack Webb, Stacy Harris and Henry Morgan. Jan Sterling supplies the s.a. on the wrong side of the law as Stewart’s moll.