forty years later, in the greyhawk realm's common year of 597, the player characters take on the role of adventurers who arrive at the free city to explore the ruins of greyhawk looking for riches and glory. under an oath with zagig, mordenkainen vowed never to enter the depths of castle greyhawk, but through researching zagig's tomes, mordenkainen only recently found a possible clue to robliar's betrayal hidden deep inside the ruins. mordenkainen, barred by oath from entering the dungeons, recruits the band of adventurers to go into the chambers for him and find the secret behind robilar's treachery. little do they realize they have stumbled upon an epic situation where failure could mean the destruction of the world.