Fifty long years ago, a devastating war sowed terror and strife across Elsir Vale. And now it threatens to do so once again. The world has never been a safe place. Bastions of civilization populate a dark, menacing world—islands of order and reason exist in a land otherwise overrun by dark cults, vile monsters, creatures from the dark edges of the imagination, and worse. Elsir Vale was once one of these places before the Red Hand of Doom, a mighty hobgoblin army, and its Dragon War; but with the help of the Heroes of the Falcon’s Star it staved off the darkness. This next generation of heroes may have strength to craft Elsir Vale into a Beacon of Light in the Darkness of the world But if their strength should fail then Elsir Vale’s flame shall be extinguished

I’m using the WotC Scales of War Adventure Path as a base for my campaign. The published campaign is pretty linear and I’ll be giving my Players more options. Letting the Vale fall and becoming its Dark Overlords is an option!

After that, take a look at your wiki. There is some more helpful info there.

Drums of War