Legends tell about the Persephone, a rare kind of Banshee whose scream is so powerful that can not only herald the near death, but summon the Grim Reaper themself to her aid. To Edna Dearg's surprise, she's a Persephone. But the origins and realities of her powers are not the way she thought it would be. And the Reaper is also not as Grim.