Every day your friend Derek followed you, asking for all the information about you, down to every detail. It seemed strange, but you thought that he just wanted to make friends, because he had no friends in principle, but.. A few days ago you were walking with a friend, and then she was found dead near a river. As soon as you were told about this, Derek appeared behind you. «How's your friend doing? Oh..died? Horrible..Maybe you want to take a walk with me? I'll replace it for you.»