It's 1878 and Dr. Jacob Cotter has assumed a role of updating his Texas physician colleagues at educational meetings throughout his home state. Cotter is returning from Dallas to his home in Endura, Texas via train, which gets derailed outside of Jennings, Texas, by outlaws posing as hostile Comanches. The purpose of the attack is to kill Abner Worthley, an Indian Affairs Officer from Washington. Worthley's mission is to validate the US peace treaty...