10 years after Dexter went missing in the eye of Hurricane Laura, we find him living under an assumed name in the small town of Iron Lake, New York. Dexter may be embracing his new life, but in the wake of unexpected events in this close-knit community, his Dark Passenger beckons.

Desperate to find their missing friend, a group of girls summons the entity they believe took her -- the evil legend of Internet lore, Slender Man.