"It stalks you. It whispers. It wants you to turn around. It wants you to look. But if you do... If you see it..." Talmouth is a lonely seaside town. No-one has heard from it for days. No-one who goes in comes out. Something has happened to Talmouth. Has it been taken over by aliens? Or is it something far, far worse? Gwen Cooper's come to Talmouth to find out. What's happened has to be seen to be believed. But by the time you’ve seen it, you’re already dead.