Twenty years after being jailed on a trumped-up charge of train robbery, Jack Garrison escapes from Yuma Penitentiary with nothing to his name but an old banjo and the hope of proving his innocence. Jack is banking on the help of his younger brother, Rick, to wreak revenge on the real criminal. But he is determined to remain undetected, and his influence puts a violent end to Rick's help. Jack finds an ally in blacksmith Ed Corcoran, and they go head to head against the true villain...