Yes, she strips naked and goes in.

At first Samantha is very hesitant to take off all her clothes in order to enter the strange structure, but then an idea hits her.

“I got it!” She exclaims. She surmises that she must be in some new virtual reality program. Maybe she went with one of the D&D players to experience a new game he was working on and it has malfunctioned. Looking at the blackened archway she guesses this might be the way to reset the program or even exit it.

Thinking she is playing but a video character Samantha’s inhibition about getting naked is diminished and she starts to remove her clothing. This “game” does feel very real, however, and she can’t help but to pause a bit and look around to make sure she is alone before taking off her unhinged bra and thong. Just to be safe she rolls up her belonging in her shirt and hides them under a bush.

Walking up to the archway Samantha can’t help but feel a bit self-conscious about being completely naked. She would normally feel more embarrassed, but with this new “virtual” body she can’t help feel a bit proud instead of being ashamed. Looking down at her sensual curves for what she thinks will be the final time Samantha ponders what it would like to really be this beautiful. Giving a sigh her gaze goes forward as she walks into the darkness.

The blackness is cold and deeper then Samantha thought but after a few steps she leaves the strange dark field. She emerges into a circular stone room with the dark archway behind her and a spiral staircase across the room in front of her that twists its way up into the tower. “You can let me out of this program now.” Samantha yells out to no one, realizing her theory is wrong and she is obviously still in the tower and buck naked.

The room is barely lit from the sunlight coming through the arrow-slits above and is colder than the outside so Samantha folds her arms and shivers a bit. The stone is cold on her bare feet and she needs to keep moving. Figuring she is already inside Samantha decides she might as well check out the rest of the tower so she heads for the stairs up.