While Valkyrie is off trying to recover her sister's lost soul, it is up to Omen Darkly to be the hero and save thousands of innocent people. Desperately trying to recover her sister's lost soul, Valkyrie Cain goes up against the High Sanctuary itself-- and there's nothing Skulduggery Pleasant can do to stop her. With Abyssinia's grand plan about to kick off in a night of magic, terror, and bloodshed, Omen Darkly must try to save the lives of thousands...