Adam, a young participant in the 21st-century "Space Seeding Plan," volunteers alongside Hannah to undergo rigorous physical and psychological evaluations for an interstellar mission. Their genetic material—sperm and eggs—is secured aboard the spacecraft Ozma, tasked with establishing human colonies on distant planets. To achieve ultra-high speeds, Ozma destroys comet resources mid-flight, a process lethal to living organisms, leaving only frozen reproductive cells and autonomous machines to endure the centuries-long voyage. The mission’s narrative unfolds across generations and cosmic events, though Adam’s role concludes with his initial selection. Official records omit his family history, interpersonal relationships, and post-mission fate, positioning him as a symbolic figure for humanity’s ambitions and ethical challenges in deep-space colonization.