AllMovie

When their friend mysteriously disappears, a group of teenage girls explore whether the culprit could be the creepy internet urban legend character Slenderman by summoning him with a ritual. They begin experiencing supernatural phenomena that make them believe the story is real and that they are now being haunted by the Slenderman. Directed by Sylvain White. Based on the character created by Eric "Victor Surge" Knudsen. Joey King, Julia Goldani Telles, Jaz Sinclair and Annalise Basso star.