Elisa Thompson is one of a group of teenagers invited to study at an international boarding school, known as the World Academy, located on a far-off island in the middle of the Atlantic Ocean.
Continuing the story of Avir, Karka, Esh and Mayim who, having faced the dangers of the kingdom of Air, now find themselves crossing a dry and desolate country: the fertile and luxuriant kingdom of Earth is succumbing to the drought caused by the Enemy, which may even be waiting for the young Seekers right in the capital, Oldstone.