Da-eun sat frozen in the center of her mat, her heart hammering wildly against her ribs. The transition from the suffocating abyss of her dream to the absolute stillness of the room was too fast, leaving her muscles locked and unresponsive.

She wanted to lift her hand to wipe the cold sweat from her forehead, but her fingers refused to obey. Her chest felt tight, as if the heavy concrete walls of Sector-04 from her nightmare were still pressing down on her.