A lone gunslinger, Jack McCall (George Montgomery), bursts into a saloon and shoots dead the legendary Wild Bill Hickok (Douglas Kennedy). Arrested and put on trial, McCall recounts a twisted tale that paints Hickok as anything but heroic, explaining how Hickok and McCall's cousin Bat (James Seay) took over McCall's family's plantation, killed his parents and even framed him for crimes he didn't commit. McCall's cold-blooded killing of Hickok was warranted. Or was it?