Playing as Jill, also known as Dori Kururi in the Japanese edition, is the player. She is the daughter of Doug, the boss of the Red Dozers, a bandit organization. A rival group known as the Skullkers ambushed Doug. To take the potent Red Diamond, a present from Jill's deceased mother, they attacked the Red Dozers. Jill mounts the powerful Drill Dozer in order to rescue it.