From publisher blurb:
Fight the darkness …or become it!
Resist the siren call of the ocean as a deep one, sharpen your fangs and hunt vampires as a dhampir, rebel against your creator as a golemkin, fight your violent side as a jekyll, howl at the moon with your lycan brothers, preserve your bloodline as one of the undying, or skulk in plain sight as one of the unseen.
Will the darkness in your soul consume you, or will you rise above it to fight the creeping uberwald, a manifestation of a powerful evil creature's corruption? The choice is yours, but be warned: few escape the horrors of a gothic horror setting with their sanity intact!
This campaign setting features new rules for bonds, sanity, and madness; rules for creating gothic environments known as an uberwald; the five stages of transformation; 7 new species, 9 new feats, 18 new subclasses, 22 new subspecies, 24 new monsters, and 25 new spells.