From "Adventure Summary and Background:"
Welcome to the finale of Season Two: To Shake the Pillars of Heaven. In actuality, this is not so much a finale’ as a campaign cliffhanger. By the end of this two part adventure, a major NPC will be dead, the Empire will be thrown into chaos, PC loyalty will be stretched to the limit and of course, the big surprise at the end.
There are two major villain factions in this adventure, though only one appears in Part I – the Brotherhood of Man and their apparent leader, the Albino.