When an automated Earth probe is dismantled by mysterious machines on Titan, a covert expedition is launched to investigate the origin of the moon's inhabitants. The mission brings together a diverse group of scientists, corporate agents, and military personnel, all operating under a veil of secrecy regarding their true objectives. As they navigate the harsh environment of Titan, they must reconcile their scientific observations with the reality of a society built by malfunctioning alien technology. The narrative follows the crew's interactions with these entities, exploring the logical consequences of a civilization that evolved from a damaged, automated factory ship.

Readers frequently highlight the balance between technical scientific speculation and the dry, satirical tone Hogan employs throughout the narrative. Discussion often centers on the theological and philosophical implications of a robot society that has developed its own belief systems based on its accidental origins. Critics note that the pacing effectively moves from the initial mystery of the probe to the complex social dynamics of the alien encounter. The world-building is often praised for its logical consistency, particularly regarding how the machines function without biological creators. Many readers appreciate how the author avoids overly sentimental tropes, opting instead for a cerebral approach to the first contact genre.