A girl investigates the disappearance of a school teacher. What she finds changes her life forever.

One day, while using a popular broadcasting video app, a teenage girl named Katie discovers the truth about the urban myth known as The Old Knitty. They say that if you stumble upon Knitty's live stream, and she happens to see you watching, she'll call out your name, and mark you. She will then haunt you via any electronic device you happen to own or be on.