Aster Calyx and Halan Kai Nelson are inextricably drawn to Beacon 23. Navigating one threat after another, they unravel the beacon’s mysteries, just in time to face their most powerful enemy.

Heidi Bergman is a caseworker at ‘Homecoming’, a Geist Group facility helping soldiers transition to civilian life. Years later she has started a new life, living with her mother and working as a waitress, when a Department of Defense auditor questions why she left the Homecoming facility. Heidi quickly realizes that there's a whole other story behind the story she's been telling herself.