A powerful land baron uses his political influence to persuade local lawmen to release his son from a simple assault charge. The young man, however, is actually the leader of the notorious Half Moon Gang--a mad pack of killers with nothing to lose! Enter Arizona Ranger Sam Burrack, a man with a tin star on his chest, hot iron in his hands, and ice in his veins. Now, the lawman must go up against a corrupt system, a powerful man of money, and a band of deadly outlaws to see that everyone gets his fair share of justice.