The world itself in peril.

Arrow's sleep is being disturbed by nightmares that she cannot remember when awake. Her days are spent trying to build her new, simple, life in the human world and helping the shape-changers track down the last conspirators that tried to destroy the Erith.

But the Erith want her help one last time. The Erith heartland needs a new monarch, and the Erith require Arrow's presence for the selection.

Nothing is that simple, though, and Arrow finds herself dealing with betrayal that could tear the heartland apart. She will need all her skills, and the help of the few people she trusts, to prevent the destruction of the heartland, and the world.