The Leydens were people of extraordinary means. The father a well-known adventurer. The mother a spiritualist oft consulted by the government of New Britain. The daughter, Kassandra, inherent of both the skill and sense of adventure that made her parents great. But when her mother vanishes without a trace, and her father turns toward spirits of a fluid nature as he loses himself in memory, Kassandra is left to find her own way and purpose. She quickly learns a sense of caution as she discovers there is as much intrigue as adventure about the world she lives in. And not all those she's had faith in are to be trusted. With the whispers of spirits in her ear and unlikely allies at her back, Kassandra strives to defend both the living and the departed…after all… It's the Spirit of the matter…