How deep has George hidden himself?

Chapter - 85

Matthew led Martha inside the building. They walked across corridors and made their way in one of the rooms way back in the building, which read, 'Store Room.'

God knows why but suspiciously, there was a bookshelf in the storeroom. Matthew walked to the bookshelf and slightly pulled a few books one after the other. After he was done, the bookshelf moved, and an elevator was in sight.

Matthew pressed the button, and as the elevator door opened, Martha followed Matthew inside. After they were in, Matthew pressed the red button and continued to do so, for about five seconds.

After that, the control panel switched, and another panel appeared. The manual panel was changed with a touchscreen one with no buttons there. Matthew bent forward and scanned his iris. After the identity was confirmed, a numerical keypad appeared, and Matthew entered some digits. When he was done, the elevator began to descend.