Obe Devlin has problems. His family's farmland has been taken over by developers. His best friend Tommy has abandoned him. And he keeps getting nosebleeds, because of that thing he doesn't like to talk about. So Obe hangs out at the nearby creek, in the last wild patch left, picking up trash and looking for animal tracks. One day, he sees a creature that looks kind of like a large dog. And as he watches it, he realizes it eats plastic. Only plastic....