In this, the latest episode in the life of Cat Chant, Cat has truly settled in to preparing for his future. The story reveals that he has come far in his apprenticeship to Christopher Chant, (the current Chrestomanci -- Chief Enchanter) and his family.
Cat has learned how to learn from a very gifted nine-lived enchanter who is (obviously) very talented, but possibly not as talented as Cat is. Throughout the book, Cat works on identifying skills Chrestomanci has that Cat still needs to learn, on when to solve problems on his own and when to call for help, and on how and when to intervene in the lives of the less gifted inhabitants of the universes he is destined to govern.
Like the plots of many other stories in the Chrestomanci series, the plot of this novel explores the problems of a gifted child (in this case a girl) who is made to feel inferior because she is special.