Saddle up and take a ride West
It’s the spring of 1873 in the Wyoming Territory, and U.S. Marshal Tim Colter and his grizzled mentor and best friend, mountain man Jed Reno, are hunting down some train robbers when they come across a man dying of gunshot wounds. The victim turns out to be a Secret Service agent who as he breathes his last says, “President Grant … assassination … Dugan … trust nobody.”