Summary:

The heroes finally attempt to deliver a wooden box for the Sensates (and Harmonium), only to caught up in the most shattering event in Sigil...

The heroes attempt to find the Harmonium outpost, and find themselves to be a target of a pickpocketing scheme. The plan fails as the one person, Marrissa, holding the box, is to well hidden and disguised.

The heroes rush to the Armory, to deliver the wooden box, only to find that they are a little too late; the box is a weapon designed to break down the Armory walls, and the assault has already started.

The Faction War begins with the Harmonium, Fraternity of Order, and the Sensates laying seige to the Armory, defended by the Doomguard, the Xaositects, and the Indeps.

The heroes then involve themselves in the pitched battle, fighting a bulugon and the Hellbound Heart, the very weapon that they were supposed to deliver...