This game is a 3.5 edition game set in Forgotten Realms. It is a module from the book released by Wizards of the Coast last year. It is a dungeon diving adventure that takes the characters from first level up to tenth level, depending on certain circumstances.
I will try to stick with the script, but may vary a few plot items here and there to fit the group better.Just after dawn, a long, rolling earthquake shakes the city awake. Cracks appear in walls and crockery rattles, but no buildings collapse.
Uproar ensues. Earthquakes are almost unheard of in the city. Rumors of disaster soon race through the streets, fueled by the anguish of people across the city whose heads fill with sharp, sudden mental visions of a screaming bearded man whose eyes blaze with rage, sorrow, and swimming stars. The visions shift into scenes of pillars cracking and rumbling, ceilings collapsing in caverns and dark rooms, and surging explosions of blue-white sparks. These tides of fearsome force leave many who receive the visions gasping on their knees, unharmed but overwhelmed by the sensation of great magical forces crashing through them. Repeatedly the screaming face returns, with feelings of strong despair, of something left unfinished-and swept away in great loss and ruin.
What has happened? A few wizards across the city who shared the disturbing visions recognize the screaming face as that of Halaster Blackcloak, the infamous "Mad Mage of Undermountain."
Soon everyone knows that something terrible has happened in Undermountain. There is an unknown but exceedingly dark doom approaching the city and the massive dungeon beneath it, and Halaster is very upset about it.
Those who have experienced the visions can't stop thinking of Undermountain, of walking through its chambers, of finding brightly glowing treasures. They yearn to go there, to answer Halaster's urgent call. Undermountain awaits, in desperate need. Something down there must be repaired, or renewed, or rescued. Halaster wants something down now, something vital. A greater calamity must be set right, or greater doom will surely come.
That night, wizards, sorcerors, and a scattering of adventurers, and others across the land dream of Undermountain and a screaming Halaster. They all feel a yearning to enter the infamous, legendary dungeon and do "something that must be done." Noone quite knows what that something is, but many momentarily mind-glimpse strange subterranean rooms, weird items, and a rushing Halaster struggling to accomplish various tasks.
Throughout the land, on the morning after the earthquake, wizards, sages, and all sorts of adventurers start packing. The trek to Undermountain has begun.