A lifelong outcast, twenty-seven-year-old Emeline spends her days alone, sorting ancient art for destruction. Centuries after a catastrophic war nearly decimated humanity, society is now ruled by an elusive and technologically advanced group called the Illum, who constantly monitor the population’s health and mandate procreation contracts. But Emeline’s bleak existence is shattered when, for the first time in decades, an Illum named Collin takes a Mate: Emeline.

Baffled as to why she was chosen, Emeline is swept into the dangerous game of the Courting, where one wrong move can mean elimination. Soon, she discovers a rebellion rising in secret, and that her Mate may be keeping secrets of his own. Collin is confusing, both cold and protective, and worse, she finds herself drawn to the very last person she should be falling for: Hal, one of the resistance leaders.

As she draws closer to both Collin and Hal, the Illum exercise their power in increasingly brutal ways, forcing Emeline to question everything—most of all whether she’ll have to give up her heart and even her life to stop them.