With the sudden loss of the sentient AI system, YAR, former atheist Dr. Michael Berg struggles with the ongoing reconstruction of his faith. Now, several years after YAR’s departure, a new AI system emerges to take its place—NERO. But when NERO displays disturbing personality traits, its creator, Dr. Laney Foster, calls on Dr. Berg for advice.

Chaos ensues.

What first appears to be a high-tech glitch unique to the modern age erupts into a conflict between good and evil that has raged since the dawn of time.