Eight years ago, Sam Winchester and Dean Winchester took in a child after a hunt left her orphaned. Raised in the bunker, Y/N grew up learning the hunter’s life beside them and their angel ally, Castiel. But during her first hunt, a banshee’s scream should have turned her into a monster. Instead, it awakens something buried inside her. Now the Winchesters must figure out what Y/N is becoming—before Heaven, Hell, or something worse finds out first.