When the end came, the world was divided. Those considered perfect, the Pure, sheltered inside the controlled Dome. Outside, the Wretches struggled in a destroyed world, crippled by the fusings that branded them after the apocalypse that changed everything. Partridge, a Pure, has left the safety of the Dome in search of the truth. Pressia, a Wretch, is desperate to decode the secret that will cure her people of their fusings forever. Together, they must seek out the answers that will save humankind, and prevent the world's annihilation.