Arizona, 1881. A stagecoach robbery with international consequences leads to a showdown between the Earp brothers and the Clanton-McLaury Cowboys.
In the wake of the gunfight, a disgraced Ike Clanton attempts to sway public opinion by branding the Earps and Doc Holliday as cold-blooded killers.
Facing murder charges, the Earps and Doc Holliday work with a lawyer to prove their innocence. As news of the case spreads, the country takes sides.
After a major courtroom defeat, the Cowboys hatch a plan to ambush Tombstone and regain power. A shocking murder pushes Wyatt over the edge.