"Zillion" is a science fiction anime series set in a distant future where humanity is under threat from the Noza Empire, an alien force seeking to conquer the galaxy. The story centers on the White Knights, a resistance group fighting against the Noza Empire on the planet Maris. The White Knights possess advanced laser guns called Zillion Weapons, which are the only effective means of combating the Noza's superior technology. The series follows three young recruits—JJ, Champ, and Apple—who are chosen to wield these powerful weapons and lead the fight against the invaders.

JJ, the protagonist, is a skilled and determined fighter who quickly becomes a key figure in the resistance. Champ, his close friend, is a strong and loyal ally, while Apple, the only female member of the trio, is resourceful and intelligent. Together, they form a cohesive team, balancing their individual strengths to overcome the challenges posed by the Noza Empire. The narrative explores their growth as soldiers and individuals, as well as their struggles to protect their home planet and its inhabitants.

The Noza Empire, led by the enigmatic Commander Gildra, employs advanced technology and ruthless tactics to subjugate Maris. The White Knights face numerous battles, both on the ground and in space, as they attempt to thwart the Noza's plans. The series delves into themes of resistance, sacrifice, and the cost of war, as the characters confront the moral complexities of their mission. Alongside the action, the story incorporates elements of mystery, particularly regarding the origins and true nature of the Zillion Weapons.

As the conflict escalates, the White Knights uncover secrets about the Noza Empire and the Zillion Weapons, leading to unexpected alliances and revelations. The series builds toward a climactic confrontation between the resistance and the Noza forces, with the fate of Maris hanging in the balance. Through its blend of action, character development, and science fiction elements, "Zillion" presents a compelling narrative of heroism and perseverance in the face of overwhelming odds.