The sun is dying. Humanity's experiments with space travel have turned the life-giving star into a planet-scorching red giant. The few survivors on earth now exist beneath domed radiation shields that keep the populace safe-for now. Fierce order is maintained among the people of the decaying cities by Artificial Representations, ARs, mindless and memoryless laboratory-grown cyborgs that patrol the streets, acting as judges, juries, and executioners to any who dare disturb the fragile authoritarian order. But when the image of a mysterious woman invades the supposedly empty consciousness of Enforcer 959, it sets in motion a chain of events that threatens not only to reveal the secrets of this so-called cyborg herself but also to destroy the last remaining vestiges of humanity-or save those who remain.

On a dying future Earth, former technologically enhanced enforcer Maece and her adopted sister, Saera, continue their secret battle against the authoritarian forces of the City of Tenebrae. Disavowed even by the resistance leadership, the two women battle both the city's military and the nefarious ArtRep Corporation with only the help of a ragtag team of fellow freedom fighters. The stop Sulos, the head of ArtRep, from using a wormhole to cause the destruction of the Sun and Earth. Complicating the life-or-death mission, Maece and Saera and their friends continue to struggle with the personal repercussions of Maece's decision to fake her own death in order to go undercover to gain information about Tenebrae and ArtRep. Can the team set aside the emotional turmoil in order to take the fight to Sulos? Or will the cost of such an attack be more than the team can bear?