Earp rides to the scene of a stagecoach robbery and follows tracks to find a woman, the sole survivor of the attack, in shock. Earp must shoot his way out of a cave when the bandits trap him inside with the woman.
Earp must enter the rough Bushwacker region to find a man suspected of murder, but his behaviour once found leads Earp to believe the man is not guilty of the crime.
Doc Holliday's bending of the law exasperates the officials of Dodge City. When Doc learns about a plot to murder five ex-gang members and does nothing to prevent it, Earp leaves to confront the killers, and Doc begins to regret his choices.
Earp has 24 hours to find a killer after a judge sentences an innocent man to hang, but the man refuses to speak in his own defence, leaving Earp with few clues to follow.