"In the Mexican borderlands, a busload of student protesters is gunned down in broad daylight, a violent act blamed on the Nemesio cartel. But its aging leader, Fox Uno, sees the attack for what it is: another salvo in the long-running battle for control of Nemesio itself; perhaps by a rival cartel, or maybe someone closer to home. Across the Rio Grande, Sheriff Chris Cherry and his deputies America Reynosa and Danny Ford find themselves caught in...