The book begins in the walled city of Aramanth, an extreme meritocracy where endless exams and ratings are the only way to move forward to improved life stations; to be unsuccessful in this is seen as a great source of shame.
Using an archaic map given to her by the Emperor she sets off, joined by her twin brother, Bowman, and their brave but pitiful new friend, Mumpo, who has an unshakeable affection for Kestrel.