Leo is a night janitor at MIT whose life is built on order and logic—every cleaning procedure follows a fixed routine, every work area meticulously memorized. However, in the maintenance tunnel of Building 32's second basement, a dark gray metal door that never existed before suddenly appears, shattering his perception of reality. Behind the door lies a dark labyrinth that defies the laws of physics—GPS fails, markings vanish, and spaces reconfigure themselves. Even more terrifying, Leo encounters other versions of himself in the maze—an aged, desperate future self and a young, confused past self. By the time he realizes he's trapped in an inescapable time loop, it's already too late. He has become a component in this system, constantly reset and consumed, doomed to discover that door over and over again in an endless cycle, forever regretting his curiosity.