John Caldone served as a fierce Indian fighter with the famed Buffalo Soldiers, courageous black men of the 10th US Cavalry but now they are discharged from the army. He and his men have left to start their own ranch but with a major cattle drive in the offing he receives news that a terrible disaster has struck. So begins his search for a reckoning but these are brutal and callous men he faces. Caldone discovers that vengeful cattle barons have recruited a posse from amongst the worst villains on the frontier to chase down the marauders. When the parties meet it will be a bloody clash that echoes all of Caldone's earlier battles - the ones he had hoped to forget.