This book features in depth information on the dark parts of the Umbra, those areas corrupted by the Wyrm, Information on Pentex, a giant corporation run by servants of the Wyrm and used to corrupt the world, a large list of monsters and dark spirits serving the Wyrm, and the tribe book for the Black Spiral Dancers, a tribe of Werewolves corrupted by the Wyrm and pulled into it's dark service.