One day, a mysterious message arrives for ATEEZ, who had been spending a peaceful time in their hideout. At that moment, everything began to change. ATINY has vanished. As if under a spell, ATEEZ wanders through a dreamlike wasteland, into a collapsing world engulfed in flames, and into the Dark City veiled in dense fog. Pursued by an unknown force, ATEEZ begins to fight back to find ATINY.