Watch 123Movies. When the vehicle of a group of road-tripping beauties is sabotaged, the girls find themselves lost in the woods of Wing Brook, Kentucky. They soon discover they are not alone. Stalking the woods is Hammerhead, a ruthless human hunter who hibernates with the 17 year cycle of the local cicada bugs. The girls only hope for survival rests in the revenging hands of Killian, hellbent on finding the predator that took his sister's life. Three stranded Vacationers, an avenging brother out to settle the score at any cost, and Hammerhead - will the nightmare end - or merely hibernate for another 17 years.