Sixteen-year-old Gwen, the newest and final member of the secret time-traveling Circle of Twelve, searches through history for the other time-travelers, aided by friend Lesley, James the ghost, Xemerius the gargoyle demon, and Gideon, the Diamond, whose fate seems bound with hers.

The course of dream travel never did run smooth--at least not in Liv Silver's experience. Able to visit other people's dreams (whether they want her to or not), Liv has solved mysteries, unearthed difficult truths, fought madmen, and escaped life-threatening peril, all from the comfort of her own bed. Liv's troubles are just beginning: a rocky romance, a malicious blogger with a hidden identity, a wedding, and a classmate (or two) dead-set on revenge....

Since learning she is the Ruby, the final member of the time-traveling Circle of Twelve, nothing has gone right for Gwen and she holds suspicions about both Count Saint-German and Gideon, but as she uncovers the Circle's secrets she finally learns her own destiny.