By the turn of the 20th century, Butch Cassidy, the Sundance Kid, Billy the Kid and virtually all of the West's legendary outlaws are either dead or in jail pending execution. Well, all, except train robber and escape artist extraordinaire, Harry Tracy. As the last survivor of the Wild Bunch, Tracy pulls off a series of profitable robberies before making his way west to Portland, Oregon, in search of Catherine Tuttle -- a judge's daughter who has captured his heart. But on the way, Tracy is betrayed, arrested, and imprisoned. However, no jail can hold him for long and after making his escape, Tracy becomes the target of the largest manhunt in the history of North America.
Mulder and Scully, now taken off the FBI's X Files cases, must find a way to fight the shadowy elements of the government to find out the truth about a conspiracy that might mean the alien colonization of Earth.