![Wish Upon (2017)](https://image.tmdb.org/t/p/w185/u0vnocj57vJt5DHoBEqUOD1G4SU.jpg)
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…