Eon has come out as "Eona" and admitted she was a girl all along. Luckily, people have accepted this, and she has become a Dragoneye. The only issue is that she cannot control her power. Every time she tries to bond with her Mirror Dragon, she becomes a conduit for the ten spirit dragons whose Dragoneyes were murdered by Lord Ido. In addition, Sethon has declared himself emperor and killed Prince Kygo's infant brother giving him only one threat. Eona must stop him now or die.
While trying to save herself and Lord Ido she kills Dillon using the death chant and steals the black folio later using it to save the dragons and kill Ido.