Turf War

Players are Adepts whose Squad is now being challenged for territory by a pack of young, upstart Supernaturals.  At least two or three powerful Supernaturals are backing the upstarts from afar, allowing them to exert more power than they normally would, and they may be armed with a Dark Object of real potency to boot.
At first the Adepts simply investigate several incidents of supernatural activity, but soon enough their own persons and property are under assault from this new threat.