The year is 1899. The game begins in a gothic mansion. The protagonist lives in this mansion. One day, they notice a strange Rubik's cube outside their home. As they approach the cube, they suddenly find themselves trapped in a terrifying maze.
Inside the maze, you encounter notes, bloodstains, and corpses left behind by those who ventured there before you. These notes help you piece together the secrets of a mysterious company called Dimension Technology Lab.
Over time, you discover that your character is "Subject No. 3." However, you also come across the chilling truth: only those with subject numbers have survived entering the maze.