Recently named the world's chief clairvoyant, Cassandra Palmer has a thorn in her side. As long as she and the master vampire Mircea are magically bound, her life will never be her own. The spell that binds them can be broken only with an incantation found in the Codex Merlini, an ancient grimoire. The Codex's location has been lost in the present day, so Cassie will have to seek it out in the only place it can still be found - the past.