Sir Robert Chiltern is a successful government minister, well-off and with a loving wife. All this is threatened when Mrs Cheveley appears in London with damning evidence of a past misdeed. Sir Robert turns for help to his friend Lord Goring, an apparently idle philanderer and the despair of his father. Goring knows the lady of old, and, for him, takes the whole thing pretty seriously.

Former buffalo hunter and entrepreneur Wyatt Earp arrives in the lawless cattle town of Wichita Kansas. His skill as a gun-fighter makes him a perfect candidate for Marshal, but he refuses the job until he feels morally obligated to bring law and order to this wild town.