Inspired by actual events, a group of 12 year old girls face a night of horror when the compulsive addiction of an online social media game turns a moment of cyber bullying into a night of insanity.
In a small town in Massachusetts, four high school girls perform a ritual in an attempt to debunk the lore of Slender Man. When one of the girls goes mysteriously missing, they begin to suspect that she is, in fact, his latest victim.