To rescue her sister's lost soul, Valkyrie Cain must invade the High Sanctuary itself, and not even Skulduggery Pleasant can talk her out of it--not even when Abyssinia's grand plan is about to initiate a night of bloodshed, magic, and terror. With Valkyrie and Skulduggery elsewhere, stopping Abyssinia's plans falls to Omen Darkly. With no one else to save thousands of innocent people, Omen will have to become the hero he never wanted to be.
