Two 12-year-old girls attack a friend in the woods, leaving her for dead. When questioned by police, they say a creature named Slender Man made them do it. Now, the parents of all three wonder how things could have taken such a violent turn.
It was a case that haunted Lancaster, Pennsylvania: the 1992 murder of teacher Christy Mirack. More than two decades later, a new breed of detective would help break the case, using DNA in a whole new way.
A teen vanishes on her way home from school. Weeks later a puzzling letter from her arrives in the mail. Where was Abby? Was she in danger? A desperate search, a girl hidden in plain sight. And a story of bravery and resilience in the face of terror.