Two newly-appointed postal inspectors, Frank Marshall and 'Slim" Hewitt, set out to track down the sender of a time-bomb to a U. S. Senator and, during their investigation, run across a hooded organization that is terrorizing an American city. They also meet Don Foster, who is loud in his condemnation of the terrorists, and his sister, Nancy, who fears for her brother's life.

Directed by: Charles C. Coleman
Written by: Bert Granet
Runtime: 63 minutes
Tagline: SCREEN DYNAMITE!
Cast:
Bruce Cabot Bruce Cabot
Frank Marshall 
Marguerite Churchill Marguerite Churchill
Nancy Foster 
Crawford Weaver Crawford Weaver
Slim Hewitt 
Ward Bond Ward Bond
Don Foster 
Charles C. Wilson Charles C. Wilson
Colonel McCollum (as Charles Wilson) 
John Hamilton John Hamilton
Cummings