From the announcement:
After a year of chaos and fighting, the new Governor-General has finally forced the city into an uneasy peace. His predecessor might have stopped there, content with the illusion of control, but Franco Marlow has bigger plans. Under his leadership, the Guild has tightened its iron grip on Malifaux City, and the Masters of the Guild have but one choice: obey his commands or suffer the consequences.
Divided by their own internal conflicts, the other factions of Malifaux have been unable to stop him. Distrust spreads like wildfire through the Arcanists, Nephilim slaughter Nephilim beneath the dark boughs of the forest, and the agents of the Ten Thunders murder each other in the streets.
Everywhere, promises are broken and loyalties are tested, and only one thing is certain: nothing will ever be the same again.