In C.E. 73, tensions between Naturals and Coordinators persist, ultimately sparking another conflict between the Earth Alliance and PLANT. Sven Cal Bayan, a Natural pilot in the elite Earth Alliance squad Phantom Pain, carries out the squad’s anti-Coordinator missions with unwavering precision. Selene McGriff, a Coordinator researcher for the neutral Deep Space Survey and Development Organization (DSSD), develops the GSX‑401FW Stargazer, a mobile suit designed for space exploration. Though their backgrounds differ markedly, the escalating war inevitably forces their paths to collide.