When Matt and his cousin Luke, a notorious bounty hunter, are besieged by the Mexicalaros, they know that they must fight their way to victory or die trying. Everyone knows the Mexicalaros: the renegade gang who terrorise ranches and settlements on both sides of the Rio Grande are feared by all. Now, the cousins are forced to use that fear to recruit help from both sides of the border and to lead a counter-attack on the deadly Mexicalaros. But will the Mexicalaros hit back? And how many must be slain before peace can return to the border? As Matt and Luke hunt for the leader of the deadly gang, the time has come to find out what the cousins are made of.