In the Canadian mountains, a trapper goes on the run accused of a crime and is pursued by a rugged and determined lawman of the Royal North-West Mounted Police.
An undercover U.S. Immigration agent falls in love with an immigrant attempting to enter the United States through Havana, Cuba in an illegal smuggling ring.
Lin McAdam rides into town on the trail of Dutch Henry Brown, only to find himself in a shooting competition against him. McAdam wins the prize, a one-in-a-thousand Winchester rifle, but Dutch steals it and leaves town. McAdam follows, intent on settling his old quarrel, while the rifle keeps changing hands and touching a number of lives.