Romain Linton, a determined and adventurous youth, arrives in Victor-Ville, an idyllic city besieged by external threats. Partnered with Clint, a fiercely loyal robotic leopard, he is drawn into the ranks of Mecha-Combat, the organization defending the city. His destiny transforms when he unlocks the ability to pilot Gordian, a formidable robotic system forged from three combined units.

Romain’s origins tie him to Victor-Ville’s creation through his late father, a visionary scientist whose hidden legacy binds the city’s defenses. This heritage thrusts him into conflict with Madokta, a fanatic bent on seizing control through advanced weaponry. Unraveling familial secrets, Romain encounters a woman asserting herself as his older sister, whose guidance helps him navigate their entwined fates.

Raised as an orphan in the wilderness, Romain grapples with reconciling his rugged upbringing with his newfound role as humanity’s protector. His journey traces his reluctant ascent to leadership within Mecha-Combat, his deepening bond with Clint, and revelations about Gordian’s origins, which mirror existential threats to mankind. Challenges—moral quandaries, betrayals, and the scars of war—test his resolve as he fights to shield Victor-Ville. Themes of technological inheritance and resilience thread through his struggles with his father’s ethically fraught inventions and mechanized combat’s consequences. Interactions with allies and foes chart his evolution from impulsive outsider to tactical leader, while unresolved threads of his past maintain deliberate mystery, pacing revelations to underscore tension and discovery.