On a nameless, featureless demi-plane the Tarrasque rages across an all-encompassing nothingness. Last seen on Faerun a century ago during the cataclysm of Odobaz, the battle mage order of the Eldritch Storm sacrificed itself to banish the mighty titan to its demi-plane prison. Now a foul power emerges in the High Ice and nightmare visions of the Tarrasque trampling cities wrack the minds of the living—can your adventurers defeat the Horror Under the Mountain?

Welcome to Pentapolis, where a wondrous tale of urban adventure is about to unfold. Our story begins with a terrible plague taking hold of the city. The streets are filled with death, the people in confusion, and nothing seems to be helping. Characters are called to aid the city but what starts as a simple mission becomes one that will entangle the characters in a bitter conflict between law, religion, the shady underworld, and ancient powers thought to have been destroyed. The Plague of Pentapolis is a Dungeons & Dragons adventure designed for four to five (though one or two more is ok) characters starting at 1st level. By the end of the story, the characters should be at least 17th level. Additional and earlier levels may be gained by those who are bold enough to seek them.