Eon is now Eona, the Mirror Dragoneye, on the run (with Ryko and Lady Dela) from High Lord Sethon's army. She is also struggling to bear the anguish of the ten dragons whose Dragoneyes were murdered by Lord Ido; as they focus their grief through her, she becomes a dangerous conduit for their power.

The three renegades are on a quest for two things: first, the black folio, stolen by the drug-riddled Dillon. And then they must also find Kygo, the young Pearl Emperor, who needs Eona's power and the black folio if he is to wrest back his throne from the self-styled "Emperor" Sethon ...