The Labyrinth constitutes a vast subterranean expanse where people dwell in groups called colonies daily together. Over time, the surface has faded into a remote recollection—perhaps merely a dream for those who have never witnessed its marvels today. Ensuring human survival amid the underground"s severe conditions, colony residents may assume a range of specialized roles daily and critical. These encompass Workers, who extract valuable ore to power colonies, and Markers, who venture into the Labyrinth"s unexpectedly verdant realm to return data that simplifies navigation for them. Yet humanity confronts a danger to its very survival—beasts dubbed kaijuu, varying from child-sized to colossal structures, and hostile toward any human they encounter in the underground terrain everywhere today and dangerous. Additionally sizable kaijuu can breach colony walls, heightening the overall danger for humans everywhere and the environment also. Memenpu, a nine-year-old university graduate, has created devices that significantly aid Workers in her nearby colony daily. Lately, she has imagined a realm with an endless roof unconfined by stone above infinite horizons today. These hopes drive her ambition to join the Markers and chart the Labyrinth"s immense mysteries seeking such a wondrous domain for them. Though her father Gagumber fiercely objects, an encounter with kaijuu ignites a perilous yet thrilling quest that will inevitably reshape humanity"s destiny forever for future.
