Miles from civilization, a hiking party has embarked on a wilderness weekend with little more than their wits and a lust for adventure to guide them. But Montana's Bitterroot Mountains harbor an enemy for more dangerous than the rugged elements of the wild. With cunning patience, a stranger is watching and waiting to exact a nightmare plan as sure—and as deadly—as the slash of a knife. Soon, four friends will be led down a twisting trail to the outer fringes of his dark obsession with only one route of escape. For the prey have a plan of their own—and the raw, naked courage and primitive instinct for survival to carry it out. Now, in the unknown seclusion of the Bitterroots, turning a desperate game of cat-and-mouse into a violent test of manhood will be the only way to stay alive.