They continued deeper into the underground facility, moving north through corridors that grew progressively more industrial.
The walls here were bare cobblestones reinforced with metal supports and floor drains.
The doors they passed bore different markings, one had numbers on it, followed by letters that might indicate danger levels or clearance requirements.
Another door had a fire sign, and another had a book symbol, but they could see people speaking inside.
They used doorways and equipment for cover while Grand Scan continued guiding their path around patrol routes. Guards were less frequent this deep, but the ones present seemed more alert.
These weren't young recruits complaining about shift work, but ones who took their job seriously and were focused.
The corridor opens into a larger space, which they stepped into.
The space was very big and perhaps forty feet across with a high ceiling. Doors lined the walls, each marked with increasingly ominous symbols.
