The series centers on Arashi and his Wild Liger. The primary antagonists are the Death Metal Empire, led by Gallagher. They employ Zoids for conquest, commanding numerous Zoids and warriors, including the Four Heavenly Kings. Arashi aspires to follow in his father's footsteps by becoming a Zoid Hunter and finding his ultimate Partner. At the start of his journey, he teams up with the Wild Liger and encounters Bacon and Team Supreme, who inform him about the Great Ancient Treasure Z.