 This causes Effy to freak out and grab the closest thing she could find, a rock, into Katie's head, knocking her unconscious.Effy returns to the camp and has sex with Freddie, but the next morning when people question Katie's whereabouts she says nothing, ashamed and unsure of what to do.Eventually Effy calls an unknown person (presumably the police or an ambulance) and requests they come and get Katie.