The world has changed around Wyatt Earp since his glory days as a lawman in the wide-open towns of the Western frontier. Now in his golden years, he's a private detective in Los Angeles—and the mistress of his late partner Doc Holliday wants him to help turn Doc's errant son away from the shady path he's chosen to walk in New York City. And there's another good reason for Earp to mount an iron horse headed for the wild, wild East: a reunion with his old friend Bat Masterson, who's traded in his shooting iron for a sportswriter's pen.
But a new breed of big city badmen roars in the '20s—organized cold-killers toting machine guns in lieu of six-shooters. And in the midst of the Jazz Age glitter, two aging, legendary enforcers could be headed for their final showdown with a brutal, hot-headed young gangster . . . named Al Capone.