Siblings Bowman and Summer were raised by their father and two uncles on a remote Colorado ranch. They react differently to his radical teachings and the confusions of adolescence. As young adults, they become estranged but are brought back together in their thirties by the prospect of an illegal and potentially dangerous inheritance from their grandfather. They must ultimately reconcile with each other and their past in order to defeat ruthless criminal forces trying to extort the inheritance.

Set in the rugged American West and populated by drug cartels, shadowy domestic terrorists, and nefarious business interests, Panther Gap shows James McLaughlin's talents on full display: gorgeous environmental writing, a white-knuckle thriller plot, and characters dealing with legacy, identity, and their own place in the world.