Concrete underfoot...

After being led blindfolded for for a few minutes, the girls slowed and began to lead you down an inclined ramp. Your bare feet now stood on cool concrete rather than grass. After covering maybe ten or twenty feet you reached a flat surface at the bottom of the ramp and the girls brought you to a complete stop. You heard a repetitive metal clacking noise followed by a long and loud metal squealing sound.

You were led forward again and told to step over what must by the threshold of a large door. Once inside you noticed that the temperature dropped by a few degrees, and the two girls at your side again urged you forward. As you walked on the smooth concrete you could hear the metal door shutting in the distance behind you.

After walking a short distance further, you were ordered to turn left and you passed through a small doorway. The girls were **** to release your biceps in order to fit through the narrow door, but Silvia stayed close behind you, leading you deeper into the room with a hand on the small of your back while Cindy was occupied with something else.

After standing patiently for a few moments your hood was finally lifted off. Silvia still stood close behind you, her hand now grasping the chain between your wrists.

Cindy approached, a thick leather collar in hand. Your eyes focused on the collar, examining it before you had even surveyed your surroundings. It was about two inches high, with red stitching on black leather and a soft red cloth lining the interior. A large metal D-ring was affixed to the front.

Silvia spoke softly standing behind you "Now be a good girl and we won't have to punish you, okay Donna?"

Cindy unbuckled the collar and wrapped it around your neck, rotating it so the D-ring was facing forward. Silvia released your wrists and reached up to secure the rear buckle.

Having submitted to the collaring, you finally observed the room around you. You were in some type of concrete bunker, the ceilings were relatively low, maybe 7 feet, heavy-duty light fixtures lit the room, with thick glass housings protected by a metal grid. The room was perhaps 15 by 20 feet, with one entire wall lined with metal shelving units. The shelves were loaded with canned food, jugs of water, bags of rice, beans, flour, etc., and all kinds of other random non-perishable food and supplies like candles and matches.

The other contents of the room, however, were not so utilitarian. There was a variety of strange furniture items, many covered in black leather and with wood painted black or covered in glossy black lacquer. There was even some kind of cage, about 8 feet long but only a few feet wide and a few feet tall, upholstered with some type of red padded cushions inside and with thick metal bars covering all the openings. You didn't know what most of these things were, but you knew you were in some kind of crazy sex dungeon.

Just then you heard the door behind you open, the third mystery girl had returned to join the fun, you presumed.