Willis stars as Tom Mix-- Hollywood's hottest action-hero who's been hired to play the legendary lawman, Wyatt Earp. Wyatt Earp has been hired as a technical expert who doesn't take to Hollywood. The Old West and the new Hollywood collide when the two heroes become entangled in a murder mystery.

Frontier lawman Wyatt Earp joins his three brothers in their feud against the villainous Clanton gang, a local clan of cattle thieves in Tombstone, Arizona. When Earp defends the sickly gambler John 'Doc' Holliday and puts a stop to the Clanton's lawlessness, the ruthless outlaws seek revenge and murder one of Earp's brothers. This leads the men into the most devastating showdown in wild West history.

Wyatt Earp is the sturdy lawman who sets about the task of shaping up the disorderly Arizona town of Tombstone, with the help of the boozy, tubercular gambler and gunman Doc Holliday. Though initially at cross-purposes, the pair ultimately team up to confront the violent Clanton gang