When her life was burned out in the flames of the bus, Lan Mingyu's consciousness fell into a cage called "Upside Down".
The building inverts not only space, but also the boundaries between life and death, good and evil.
Survival is the only obsession, but it comes at the cost of blood-stained hands; cards are the key to clearing the level, but they may also become a life-threatening spell.
A strange NPC offered her an olive branch for trading, and a mysterious red-haired man watched her trump card.
In an eighteen-level game where no one can escape alive, Lan Mingyu uses her bones as a blade and wisdom as a shield, vowing to completely reverse this imposed fate.
Concept: Confrontation between rules and freedom