Matt Slaughter and Ike Brister barely survive a clash with the Sioux-led by the dreaded Iron Claw. Back at Fort Laramie, Matt and Ike sign up as cavalry scouts, just as Iron Claw declares war on all whites. And when Matt's girl is taken captive, a bloody showdown with Iron Claw is inevitable, beyond the mountains Matt and Ike fled for dear life-in a valley called Little Bighorn.