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 and everyone is a suspect...

Two scientists raise three children contrarily to their genetic tendencies in order to prove the ultimate power of nurture over nature.