Two middle school girls, Morgan Geyser and Anissa Weier, decide to sacrifice their friend Payton Leutner for the infamous online horror villain Slender Man. After reading stories about Slender Man, the two 12-year-old girls attempt to murder their classmate, but they soon discover that committing a cold-blooded murder is much easier said than done.

At a young age, Michael Hernandez develops a dark obsession with serial killers—specifically, Hannibal Lecter and Buffalo Bill from Silence of the Lambs. In an attempt to mirror these horror villains, Hernandez decides to start his very own killing spree. He lures classmates Jamie Gough and Andre Martin into his school bathroom, and only one of them lives to tell the tale.