Eren Nor, wakes up on a school's rooftop with another student named Terry Phaser. They're both suffering from dissociative amnesia, for any information about their friends, family, or personal interests, are completely forgotten.

The school is completely surrounded by an endless white space, with a single radio tower in the distance. They explore the school in hopes of regaining their memories, but it seems that every memory makes them grow farther apart.

This surreal purgatory they are trapped in, starts to become a labyrinth, for rooms start to move around, any attempt to escape leads them back to the roof, and there's something haunting the school hallways.