From publisher blurb:
Dragons are a staple of roleplaying fantasy. Few menaces have been more explored or detailed than the dragon. For modern d20 players who enjoy occult and conspiracy themed campaigns, the dragon represents a wealth of mythology with which to develop a secret society campaign model. Using the secret society rules presented in Blood and Relics (2nd Edition), this dispatch article outlines a modern horror campaign model based on the traditional concepts of fantasy roleplaying dragons.
The conspiracy at the heart of Blood and Relics is focused on the Blood War between the Sang Real and the Caeder. Blood and Dragons also involves a secret war - one revolving around secret societies created to protect the bloodlines of ancient wyrms. This hidden struggle pits two factions against each other: one group that follows the evil, colored dragon bloodlines (black, blue, green, red, and white) and another which follows the good, metallic bloodlines (brass, bronze, copper, gold, and silver).