Six friends go on an annual hiking adventure deep in the Arizona desert. But when the hikers stumble across a dead parachutist carrying a fortune in uncut diamonds, the game is afoot. With no means of communication with the outside world and unable to reach a consensus on what to do with the stones, they agree to pack the treasure out and decide along the way. As they hike back toward civilization, members of the group begin dying under mysterious circumstances. Is someone following them? Or is there a killer in their midst?