Twelve has become a hunter and chosen a new name to reflect her elemental power: Phoenix.

Three months after the destruction of the Hunting Lodge, a witch arrives from the frost palace of Icegaard, desperate for Phoenix's help. Icegaard is in grave danger from an evil force called the Shadowseam, and if the witch-palace falls, all the clans of Ember will fall with it.

Travelling north, Phoenix and her friends, Five, Six and Seven, must battle frightening new monsters and find a way to defeat the Shadowseam. But as Phoenix learns to control her new power, the faceless Croke begins to haunt her dreams...