Since losing her great love to the Queen of the Sainted Isles, Arden must fulfil an impossible promise before she can return home - she must complete the dangerous Rite that will return Jonah's spirit to the abyssal Court of the Deepwater King. This sets her off on a journey far out at sea to find believers of the old religion on the oil-slick and mysterious islands beyond the horizon. The sensational follow up to MONSTROUS HEART.