After a series of catastrophic natural disasters nearly annihilated life on planet Zi, humanity has slowly rebuilt civilization a thousand years later, excavating ancient Zoids from the sea and underground. In a small village that venerates a massive sword as a sacred relic, a teenage boy stumbles upon an ancient Liger‑type Zoid during a deep‑water salvage mission. When skeletal Bio‑Zoids launch an attack to seize a powerful generator housed in the village, the boy awakens the Liger. He discovers that the village’s holy sword is actually the Liger’s weapon, and together they repel the mysterious Bio‑Zoids, at least for now.