In a futuristic era where peace reigns thanks to the enigmatic entity known as 'The World,' the airship Norn embarks on a crucial mission to transport nine individuals with unique abilities to this mysterious entity. Among the passengers are Koharu, who grapples with her destructive power while fleeing loneliness; Mikoto Kuga, a barrier-wielding noble intent on safeguarding the Norn and its occupants; and Nanami Shiranui, burdened by a painful ability and haunted by a past transgression. As the journey unfolds, tensions mount as the passengers discover an unexpected stowaway, triggering a series of events that culminate in a harrowing assault on the ship. Amidst the chaos, the group faces daunting questions about their powers and the ultimate purpose awaiting them at The World.