In a small Massachusetts town, a chilling internet legend becomes a terrifying reality for a close-knit group of friends. After performing a ritual online to summon the mythical Slender Man, high school students Hallie, Wren, Chloe, and Katie begin to experience a series of disturbing and inexplicable events. As their reality fractures, one of them vanishes without a trace, compelling the remaining friends, led by the determined Joey King and Julia Goldani Telles, to delve into the dark lore they foolishly invoked. Directed by Sylvain White, this atmospheric thriller follows their desperate investigation into the woods and the town's hidden history, where every shadow could conceal the tall, faceless entity. Paranoia mounts and friendships are tested as they race against time to uncover the truth behind the haunting figure, realizing that some curiosities come with a permanent and horrifying price.