A One-Round Adventure for 5th Level Characters
Cabal of Shadows Faction Adventure
From the introduction:
The Cabal of Shadows has been a new player to the politics of Stormreach, but now that they have arrived, they are a quick study.
The Cabal of Shadows assigns the PCs a task to kill six targets in Stormreach. The PCs are given three days to find their targets and plan an attack to kill all of them in the course of a single night. Other Cabal of Shadows cells have a similar assignment and all the cells must act in concert to minimize Stormreach's response to the attacks.