Reeling from the recent tragedy of the Battle of Ancient Creatures, Everine has only one goal--to reunite with her daughter. Whatever the cost; and the costs are high.
The Elementals starts to come to terms with their destinies, and Ayva is about to discover so much more than she could have imagined. Together they set sail to find allies. It turns out that allies, as well as enemies, can be found in the strangest of places.
The young Elementals have to take back Aradria, but to do that they will first have to face the most feared person in the history of their world; the Heartless King himself.