Firmament: Chapter Three
Intricate engravings of winged creatures; dripstone flows; galleries submerged in that awful violant glow. This is the sanctum-fortress of Zenith, highest point in the vast cavern of the Neath, where the cult of the Illuminated roam.
The third chapter of Firmament has arrived! Travel across the Miser-Roads to the heights of Zenith in search of your dreams of fire. Mingle with the Illuminated. Bond with a Moon-Miser. Defy Zenith's Keepers and breach their sanctum sanctorum, where awful secrets soak in violant light.
Firmament is Fallen London's current major expansion, a main story arc that's free to all players. It begins once you have progressed the Railway story arc as far as Ealing Gardens, although will require more progress in the Railway as chapters progress.
As part of this chapter, you'll unlock permanent access to a new Roof location: the fortress of Zenith. Here, you'll be able ascend the violant-flooded halls of the High Sancta in a repeatable new activity, as well as develop your trade network with the Midnight Moon. Finishing the chapter will also unlock a new route through the Stacks.
Continue the story of Firmament from the Midnight Moon. If you've not yet begun Firmament, look for an Opportunity Card in London.