The book unfolds in a richly detailed sci-fi universe where humanity struggles to survive in a cosmos ruled by advanced civilizations and remnants of their fractured past. Kent Reacher, a skilled astronaut from the year 2727, sacrifices everything for his family in Earth's apocalyptic wasteland. During a mission near the sun, he is exposed to a divine anomaly, transforming him into an immortal being encased in unbreakable metal. Waking up 7,000 years later, he discovers that humanity has abandoned Earth, relocated to Mars, and evolved into scavengers and industrialists. Guided by Elon Musk's AI legacy, Kent must navigate this strange future, uncover the secrets of his transformation, and decide his role in humanity's next chapter.
As the narrative progresses, Kent’s struggle to adapt, regain his purpose and understand his newfound power becomes central. Alongside vibrant characters like Tenna Voss and the Last Chance crew, the book delves into cosmic mysteries, corporate greed, and Kent's search for redemption.