The PCs begin in the port city of Luskan, where they're hired on by a caravaning merchant to perform guard duty for the long, dangerous journey over the Spine of the World Mountains. If the heroes do well, they reach the small town of Targos, where they hear rumors of a dead mage's lost tower out on the tundra. In order to find it, the PCs must overcome numerous obstacles but may find allies in the peoples of the Ten-Towns region, including a barbarian prince, a sly halfling, and a unique ranger. Not all is as it seems, though, nor can all smiling faces be trusted. Can the PCs separate the truth from the lies, locate the Accursed Tower, determine all its secrets, and survive?
From the magazine: "A rebel leader is locked in a prison from which there is no escape. That's why the rebels called for you." The players are recruited to help rescue a prisoner of the Theocracy. The prison is very unique in that the cells are situated in a wheel formation. The prisoners are forced to push against their cell walls every day until after 1 full year (1 full rotation of the wheel), an opening appears in their cell and they are free to leave. There are many paths to success in this adventure, and it can play out more like a heist rather than a dungeon crawl.
The Sinister Spire describes an underdark city the the necromancers tower that is in it. The adventure is the second part of the 3 part series though it can easily be played on its own. The Adventure covers getting to the underark city of pedestal, The city its self, an island of luminescent fungus, and the Spire its self. This adventure can also be used just for the underdark city.