An insurance investigator, a dame with a yen for the finer things in life and a mail robbery gone horribly wrong are the ingredients in this low-budget but highly engrossing film noir. Charles McGraw and Louis Jean Heydt are tough insurance agents but their partnership comes in for some rough sailing when he former falls head over heels for Joan Dixon, a lady apparently not averse to letting herself be wined and dined by an obvious gang leader (Lowell Gilmore). In an attempt to win the lady's favors, McGraw concocts a plan to rob a mail train insured by his own company. Too late does he discover that the girl is perfectly willing to accept him as he is.