A story of the Michigan State Police and the strong sense of loyalty and duty it instills in its men. It follows the career of a newly-inducted rookie, Ross Martin, who has joined the force at the urging of his sweetheart, Mary Adams. Martin soon distinguishes himself by his bravery in the apprehension of criminals. But when the leader of a gang of bank robbers falls into his hands and then escapes, because of carelessness on Martin's part, he is suspended from the force.
Fred MacMurray
as Trooper Ross Martin
Ann Sheridan
as Mary Adams
Guy Standing
as John Vilker, alias Prof. Anthony
Marina Koshetz
as Nan Vilker
Dean Jagger
as Trooper Jim Burton
William Frawley
as Training Sgt. Barrel
Frank Craven
as Sheriff Peter Arnot
Nora Cecil
as Granny Adams
Charles C. Wilson
as Trooper Captain Ryan
Joe Sawyer
as Whitey, burly henchman
Mack Gray
as Smoke, thin henchman
Eddy Chandler
as Trooper Haynes, Car 45
