"Kōkaku no Pandora" is set in a futuristic world where cybernetic enhancements and advanced technology are commonplace. The story centers on Nene Nanakorobi, a young girl with a unique ability to manipulate electromagnetic waves, a power she gained after a tragic accident that claimed her parents. Nene lives on Cenancle, a man-made island, under the care of her uncle, Uzal Delilah, a scientist who specializes in cybernetics. Her life takes a dramatic turn when she meets Clarion, a cyborg bounty hunter sent to protect her from a mysterious organization seeking to exploit her abilities.

Clarion, a skilled and stoic fighter, becomes Nene's guardian and companion. Together, they navigate a world filled with corporate intrigue, rogue cyborgs, and shadowy factions vying for control over advanced technology. As Nene learns to harness her powers, she discovers that her abilities are tied to a larger conspiracy involving the Pandora Device, a powerful and enigmatic piece of technology capable of reshaping the world. The Pandora Device is sought after by various groups, including the nefarious organization targeting Nene, as well as Uzal, who has his own hidden agenda.

The narrative explores themes of identity, humanity, and the ethical implications of technological advancement. Nene's journey is one of self-discovery, as she grapples with her cybernetic enhancements and the moral dilemmas they present. Clarion, meanwhile, struggles with her own past and the nature of her existence as a cyborg. Their evolving relationship forms the emotional core of the story, as they confront external threats and internal conflicts.

The series blends action, science fiction, and drama, with a focus on character development and world-building. The futuristic setting is richly detailed, showcasing a society where the line between human and machine is increasingly blurred. The plot unfolds through a series of interconnected arcs, each revealing more about the Pandora Device and the forces seeking to control it. As Nene and Clarion uncover the truth, they must decide how to use their abilities and whether to trust those around them, leading to a climactic confrontation that tests their resolve and the bonds they have formed.