While searching the archive in the Temporal Guild library, young Jon Seymour discovers a book, filled with secrets and political intrigue. Written by an expelled member, the book includes plans to overthrow the Guild. Jon and his mentor are sent on a mission through space and time, to arrest the conspirator, but disaster befalls them and the Temporal Guild is taken over. Forming a small group of survivors, they plot to retake the Guild. Eventually, they uncover the meaning of a secret that changes the course of their lives and the future of the Temporal Guild.