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The main teaching building of the Army Officer Academy was a four-story structure, with the first floor serving as the archives storage room, and the entrance stairs leading directly to the second floor.
Upon entering through the central main entrance on the second floor, there were corridors to the left and right, extending east and west, with classrooms on either side of the corridors.
Going further up, the building's structure remained the same, except that the function of the rooms changed from classrooms to research offices.
Fritz ascended the stairs, carrying a lantern, and arrived at the fourth floor of the main teaching building.
The corridor on the fourth floor was pitch dark, like a bottomless, inescapable cave.
Only a faint light shone through the crack of an office door at the end of the right corridor, on the north side.
Step by step, Fritz walked toward the office with the light, his footsteps echoing behind him.
