Story of blood brothers whose bonds are tested when marauding Sioux Indians cross the border to enlist the peaceful Cree in a battle against the Great White Father.

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.