It's probably a sad story about a group of wild beasts that eat humans and are killed by humans who claim to be righteous.
??? If there is such a world, the boundary between humans and beasts is blurred, just like chewing flesh and blood to promote their evolution. As long as you eat a person, you can become an "adult". The beast that retains the person's strongest emotions but is completely blank about the world will usually pursue that burning emotion like a moth to a flame.