Once she was Eon, a girl disguised as a boy, who risked her life to become a Dragoneye apprentice. Now she is Eona - one of just two surviving Dragoneyes - on the run and yet supposedly her country's saviour.

And Eona is hiding another, more dangerous secret...she cannot control her power. When she tries to bond with her Dragon, the anguish of the ten spirit beasts whose Dragoneyes were murdered surges through her and she becomes a terrible killing force.

As the malign High Lord Sethon strives to create a potent weapon, Eona faces assassins, savage battles, jealousy, betrayal and the heartbreaking truth about herself as she fights to help the Pearl Emperor's true heir inherit the throne. Can she contain the darkness that seethes within her? One wrong move could obliterate them all?

Against a backcloth of dazzling swordplay, ruthless power struggles and exotic, arcane lore, unfurls this thrilling story of a young warrior who must find the courage to tread the razor line between what is true and what is just.