If the Inhuman race was born of Kree experiments, then who made the Kree? Enter the Progenitors! Meanwhile the Inhuman Royal Family, led by Black Bolt and Medusa, are searching for the Prima Materia—the original Terrigen. But even if they find the chemical that will save their dying race... can they escape the revenge of its creators? It has been foretold that of the seven who left Earth, only six will return—and Medusa is already dying. Who will the Royals lose?