From the introduction:
Deep in the mists of time, the Gods fought for the creation of the universe. Mighty beings carved out realms from the very essence of creation, and drew power to themselves as they did. One of the most famous of these was Gruumsh, the Orcish God, one-eyed, violent, and vicious. Gruumsh took Luthic as his mate, subordinate but still powerful, and she became orc-kinds goddess of fertility and family. Few, however, know that Luthic had a brother. Older, wiser, Borchos was, in the early days, the orc god of medicine and wisdom, a shamanic leader who balanced the violence and aggression of his brother-in-law. It was Borchos who healed Gruumsh's eye after Corellon put it out, and he who Gruumsh eventually blamed for failing to heal him completely. But it was not that which led to Borchos' downfall - instead it was Borchos' attempts to heal Gruumsh of his very nature, his violence and his blood-lust.