Tina Owen is an Advancer serving a 2,000-year sentence for destroying an entire planet. Offered freedom by Domestic Union of Arms officer Mugal, she takes on a mission to investigate the lethal Omega 13, where previous Advancers met their end. Her assignment requires identifying and eliminating threats while evaluating exploitable resources for the Allied Earth Government.

Known for independence and combat mastery, she leads her team. Her skills encompass advanced weaponry, physical combat, and high-stakes strategy. She recruits individuals such as Akira Sato as her Lancer and Garuda, a rival Advancer racing to reach Omega 13 first.

Her background hints at military or special operations experience, reflected in her capacity for large-scale destruction and tactical expertise. The mission thrusts her into extreme hazards: hostile entities and deadly environments on Omega 13. Specific encounters involve battling monstrous tentacled creatures and navigating lawless zones like Space Station M-75, infamous for its black market and lack of regulations.

Interpersonal dynamics include mentoring Frill, who serves a supportive role. The mission forces Tina to confront her past, exploring unresolved trauma and motivations tied to planetary destruction. Her journey culminates in facing Omega 13's primary threat, leading to a resolution that addresses the planet's dangers.