The sole survivor of a massacre, Dr. Ciro Kwakkenbos, has spent the last six years in intensive therapy. He's finally capable of working with Artificial Intelligence again—and comes to the Ceres colony determined to prevent robots from committing any future atrocities.
When he arrives, Ciro realizes the robot in charge of the colony's security, S.A.G.E. (Sentient Automated Geo-sentinel Engineer), is dangerously close to complete sentience. S.A.G.E. is more interested in observing the colonists' everyday lives (and matching them with appropriate musical soundtracks) than following its intended programming. Robots aren't supposed to be charming, kind, or compassionate, either.
But as Ciro investigates, he discovers S.A.G.E. has learned how to lie and—possibly—harm and kill humans. Worse, S.A.G.E.'s memories have been hacked, deleting a deadly secret.
Despite the danger S.A.G.E. poses, Ciro can't deny the feelings growing between them. Now Ciro must unravel the truth behind the missing memories—before S.A.G.E. and the colony are doomed.