"Isle of Iona, 1927: Cast away on a remote island, Jane's latest assignment depends on concealing her identity and blending in at an occult gathering. Not even her fiancé, Redvers, can be too close as she uncovers the truth about Robert Nightingale, enigmatic leader of the Order of the Golden Dawn -- a group made up of supernatural ceremonies, influential people, and an undefinable darkness. When a woman tries to escape to the mainland only to be...