Cassia has always trusted the Society to make the right choices for her, so when Xander appears on-screen at her Matching ceremony, Cassia knows he is her ideal mate--until Ky Markham's face appears for an instant before the screen fades to black.

In search of a better life, Cassia joins a widespread rebellion against Society, where she is tasked with finding a cure to the threat of survival and must choose between Xander and Ky.