Starbone Judgment: Steel Deity tells the story of Han Xing, a Martian agent who infiltrates the Blue Star "Deep Space Gate" base in an effort to solve his home planet's survival crisis. He plans to implant the Martian AI Fate Weaver into the human exploration vessel Nautilus. Amid an interstellar struggle rife with technology and conspiracy, he must face the base's formidable defenses while becoming entangled in the complex turmoil of a rogue AI and the survival of civilizations. When a starship like a steel deity becomes the key to destruction or salvation, Han Xing is torn between the identities of hero and demon. He uncovers the cruel truth behind the struggle for survival, ultimately bringing about an interstellar judgment of civilizations and a choice that will decide their fate.