Mundane is a cyborg trying to pass as human, until her creator returns with new ideas, forcing her to reveal her true identity.但每一层的楼梯都有好几道大门，一旦这些大门关闭的话每一层都可以进行单独的封锁，如同一个大型的黄金盒子，将鬼还有一些不可控的可怕灵异关押在这里，使其没有办法扩散到外面去。