This is the story of a little village with a mute as an inhabitant. All the townsfolk are mean to him and think he is an idiot because he cannot speak
The school teacher is then killed followed by a stream of people. They don't seem to be related but then it turns out these were the people who had hurt 'the village idiot' in some way
The police then track him down and find his front door locked. Once inside they find he has hung himself with a note saying the last person he must kill is the person who has hurt him the most...himself!