Appointment with Danger plot
"ALAN LADD as the U.S. Mail's ace agent smashes the biggest mail robbery plan in history!"
United States Postal Service Investigative Specialist Al Goddard is assigned to arrest two bandits Joe Regas and George Soderquist in Gary, Indiana. The two bandits have killed a Postal Service detective. First, Goddard must track down the only witness to the murder, the attractive young nun Sister Augustine. Goddard poses as a criminal to gain the trust of gangster leader Earl Boettiger. Boettiger has worked out a plan to defraud the Postal Service for $500,000.