Siles follows the Queen like a shadow, protecting her from the many dangers that arise from ruling a treacherous hierarchy of magicians. He doesn't have magic like the other members of the ruling class, but his ability to resist their magic allows him to enjoy their luxurious lifestyle.
After the Queen's death, a new magician with an almost obsessive interest in Siles takes her place. Meanwhile, a commoner rebellion begins to build that, for the first time, Siles might not be able to or want to suppress.