Innistrad is a world beset by terrible evils on all sides and betrayed by the hope it held most dear. Avacyn has finally returned, but what new evils have come with her? Madness is plaguing the inhabitants. Terror falls from the skies on blood-spattered wings and nameless horrors lurk in the shadows. Odd things are afoot: the forces that had protected the humans have been twisted into something dark and strange. The planeswalkers of the Gatewatch investigate its dark mysteries.