A bright, talented and lonely long-distance runner twists her ankle as she prepares for the Olympic Trials and must do something she's never done before: take a day off.

Unsettling events escalate into animal atrocities shortly after the Thompson family moves into their new home. Suspecting the neighbor's son Christian is behind the disturbing events, Laura Thompson digs deep into local legends of the paranormal. Faced with a growing sense of connection to the child, Laura begins to wonder what really is "the evil that lives next door?"