The life of the youngest musketress of Ninetha has been one of hard training. But Lilith's days have also contained many pleasures, the royal privileges of her family's guardianship of the Cornucopia, a mystical source of limitless bounty. Lilith has never seen a book, and she never expects to encounter one within the safety of the citadel.

When Ishmael, an outcast librarian, shows up outside the Afriq Gate, Lilith saves him from immediate execution by her father's second-in-command, the zealot Kira. As Lilith's curiosity draws her to Ishmael, she lets slip her family's most dangerous secret, sparking a deadly rebellion and an unexpected journey full of stunning revelations.