All Will Die — Kristopher Rufty

A year after a group of teenagers were brutally murdered in the mountains, their parents return to the scene of the crime in hopes of luring the killer out of hiding. Unfortunately for them, they are successful. Though they expect the fight of their lives, they quickly learn how unprepared they are for the savage brutality that awaits them. One by one, they will experience exactly what their children endured in their own night of hell. Their obsession has led them to this nightmare and their one chance at retribution. But if they don't succeed...ALL WILL DIE