Return of the Eight (2e)
An enemy of the Circle of Eight¸ "a group of powerful magicians dedicated to preserving the balance between good and evil"¸ has captured one of the Circle's members¸ Jallarzi Sallavarian. The player characters become embroiled in the Circle's machinations as they try to rescue her. The characters move from the shantytowns of Greyhawk City¸ to the fortress-tower of the archmage Tenser¸ a member of the Circle of Eight who was slain some years ago.
It begins the night a dragon falls on an off-duty adventurer. Fortunately¸ it's a small dragon. Unfortunately¸ it's connected to a big problem. Make that a huge problem: The survival of a well-known wizard belonging to the Circle of Five is at stake¸ but that's not the worst of it. Evil forces are attempting to infiltrate a secret fortress and unlock vast magical powers¸ but that's not the worst¸ either. The bad news? Some old enemies of civilization in the Flanaess have returned¸ and they've discovered a mutual interest in world domination. They have a plan to bring it about. And their plan is already underway when the little dragon appears. Worse¸ on this particular nights¸ there's no one who can stop them - no one but any heroes who can start this adventure and survive through its out-of-this-world climax. And they have no choice. It they fail¸ the City of Greyhawk and all the civilized lands of the Flanaess will get to meet some remarkable legendary figures. Then civilization will die. Screaming.