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... Thrills, chills and screwball comedy meet tiny bikinis and gory dismemberment in this chlorine and blood drenched murder mystery.