Joe Shimamura and his fellow cyborgs continue their fight against the Bresudo, the ancient shadowy organization that has secretly shaped human civilization for millennia. Now operating alongside the newly formed UN Guardian troops, the cyborgs find their purpose tested as the threat intensifies. With journalist Lucie Davenport's investigation drawing them deeper into the conspiracy, Joe and his team must confront what it means to be humanity's protectors in a world that increasingly questions whether they're saviors or relics of a bygone era. The conflict pushes beyond simple combat: the cyborgs grapple with obsolescence as global institutions take center stage, while the Bresudo's true endgame remains shrouded in mystery. Tensions rise between those who want to retire from the constant fight and those who see no choice but to continue. What emerges is a story where duty collides with the desire for a normal life, and where the line between being used as weapons and choosing to act as heroes grows dangerously thin.