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 true villain. But the person who masterminded the robbery is determined to remain undetected, pulling many strings to protect his identity. His influence puts a violent end to Rick's help, and Jack's old friend Joe Dublin also pays with his life. Fighting for survival, Jack finds an ally in blacksmith Ed Corcoran, as they go head to head against the true villain in a violent climax.