Albert I. Melamed

To celebrate their graduation, the teenagers from Valley Hills High School have organized an ’80s-themed party at the old Wet Valley water park. Things turn gruesome when it's revealed that a mysterious maniac has inserted giant razor blades into one of the water slides. The water park thus becomes the backdrop for a bloodbath (literally), and everyone is a suspect...

Christmas break, 1971. Samantha and Clara, two students who are staying behind for the holidays at their boarding school, must survive the night after the arrival of uninvited visitors.