Iko and Liam must capture Lysander Steele and his band of rebels before they destroy the fragile peace accord between the Earth and the Moon. Cinder, Kai, Scarlet, Wolf, Cress, Thorne, Winter, and Jacin are involved in the fight, but Iko is the one who will have to face her deepest fears. Questions about love, friendship, and mortality take her on a very emotional journey.