Long gone was the age where humans ruled the world.

Humans discovered magic and superpowers called gifts awakened in the fortunate few. One thing led to another and the world changed forever. The sun darkened and clouds obscured the heavens. Radioactive snow would rain upon the land as demons pushed humanity to the brink of extinction.

A century later, the remnants of man built a city around a strange structure. A giant gate leading to another world which they called the labyrinth.

Grant is but a humble bartender and alchemist who had some strength and reputation to his name. But through a series of events, he was tasked to help a bunch of kids survive and go far inside the labyrinth. Together with his teammates; an impulsive child who he saw as his own, an arrogant young boy, a problematic witch and a runaway girl. Together they delve into the dungeon and chase after their goals.

Delving into the ruthless Labyrinth again, follow the tale of Grant and his companions as they attempt to uncover the mysteries of the labyrinth itself. Trials and tribulations blocking their path onwards, the weak would be culled and relationships would be tested. Step by step they learn more about the inner workings of the structure, slowly unraveling a mystery millennia in the making.

At the end of it all, what truly lies at the deepest end of the Labyrinth?