Washed up on the Oregon coast, Casca discovers that life on the frontier is hard and cruel. Hired out as a bar bouncer, he falls foul of a gang led by a ruthless son of a rich and powerful ranching family and sets out to get revenge for the rape and assault on a saloon girl.

Wounded in a shoot-out where only one of his quarry survives, Casca, now calling himself Casey Long, embarks on a search to find the lone survivor, and the trail leads to the 7th Cavalry in Dakota Territory.

Joining up, Casey finds a war with the Sioux and Cheyenne has broken out and he is sent with the rest of the unit under George Armstrong Custer to pacify the natives.

Against a backdrop of hunting down the last of his prey, Casey is set on a date with fate at a place that will become known as The Little Bighorn.