When Ember left her home to enter a mysterious order of Knights, an order that protects our world from the next, she thought she was finding her true home. A family, a purpose and, most surprising of all, love. But that was before. Now, the order is on the edge of destruction - driven apart by someone they trusted the most. With hope fading, Ember attempts a desperate escape. But she faces relentless pursuit by supernatural horrors that act on the commands of a mysterious evil. What she discovers in the shadows will shatter their world and bring a divide that will reverberate down the generations...