She thought the strange knocking outside her bedroom was just her imagination.

Three knocks. Every night. Always at 2:47 AM.

Then the footprints appeared beneath her window. Three bare footprints that never arrived... and never left.

As the haunting follows her from house to house, she discovers something far worse than a stalker waiting in the darkness. Some things don't want to get into your home.

They want to become you.

Turn off the lights, put on your headphones... and listen closely.

You might hear three knocks.