"A map, actually." If you didn't think that her world was odd as it was, you may now.

"The technology is advanced and within it is an in built defence - one to protect the technology against vampires, to keep the location of the city it holds within it secret." Helen paused, just briefly. "There is one problem, however. That protection also comes attached with a self destruct to it. Removing the vampiric presence from the sensors deactivates it."

And then came another pause, and a slightly uncertain look. "I can't actually activate the map without setting that off." Without the protection that Nikola had created, something that she would need to recreate first. Thankfully she had the plans for it, anyway.