This girl is proof that we can save you all. If you ignore our plea, we will kill our hostages one at a time. To be a Pure is to be perfect, untouched by Detonations that scarred the earth, and sheltered inside the paradise that is the Dome. But Partridge escaped to the outside world, where Wretches struggle to survive amid smoke and ash. Now, at the command of Partridge's father, the Dome is unleashing nightmare after nightmare upon the Wretches in an effort to get him back.

At Partridge's side is a small band of those united against the Dome: Lyda, the warrior; Bradwell, the revolutionary; El Capitan, the guard; and Pressia, the young woman whose mysterious past ties her to Partridge in ways she never could have imagined. Long ago a plan was hatched that could mean the earth's ultimate doom. Now only Partridge and Pressia can set things right.