Before the U.S. Civil War rebel leader Luke Darcy sees himself as leader of a new independent Republic of Kansas but the military governor sends an ex-raider to capture Darcy.

A convicted bank robber, serving his sentence and yearning for freedom, becomes entangled with a psychotic, homicidal inmate. This inmate turns on him, terrorizing his wife and murdering his friends.

The rebellious Thracian Spartacus, born and raised a slave, is sold to Gladiator trainer Batiatus. After weeks of being trained to kill for the arena, Spartacus turns on his owners and leads the other slaves in rebellion. As the rebels move from town to town, their numbers swell as escaped slaves join their ranks. Under the leadership of Spartacus, they make their way to southern Italy, where they will cross the sea and return to their homes.

When Clay Santell stops in the town of Sutterville after having his horse stolen, he is mistaken by townspeople for a murderer named Travers. The townspeople capture Santell, and turn him over to lawman Harry Deckett. Deckett, who is tired of chasing the real Travers, decides to kill Santell and pass him off as Travers. Santell escapes from Deckett, taking lovely Janet Gifford hostage in the process. Janet comes to believe Santell's story, and helps him in his struggle to prove his real identity.