Stealthy Steps

My name is Gemma Keyes. Other than my name, I am utterly forgettable-so those who never paid much attention to me in the first place haven't exactly noticed that I've disappeared. Vanished. Oh, it's much more complicated than it sounds. And let me tell you, invisibility comes with it's own set of problems!
I should tell you about Dr. Samuel Bickel, world-renowned nanophysicist. We used to work together, but I'll be candid with you: He's supposed to be dead. Well, he's not. Instead of the proverbial "six feet under," he's subsisting in an abandoned devolution cavern beneath the old Manzano Weapons Storage Facility on Kirtland Air Force Base here in Albuquerque.
"I need to show you what I'm protecting here, Gemma," he insisted. I stared into the clear glass case. I could hear . . . humming, clicking, buzzing. A faint haze inside the box shifted. Dissolved. Came back together. Reminded me of how mercury, when released on a plate, will flow and form new shapes. Only this, this thing was "flowing and forming" in midair. My mouth opened to a stunned "o" as the silver haze resolved into blue letters.
H E L L O
Dr. Bickel hadn't pressed any buttons. Hadn't said anything to them. Hadn't gestured. He grinned. "Ah. They've noticed you."
And I need to warn you about General Cushing. The rank and name likely conjure images of a lean but muscled old soldier, face cemented in unyielding lines, iron-gray hair cut high and tight. Let me disabuse you of that impression. General Imogene Cushing is short and a tiny bit plump. She wears her beautiful silvered hair in an elegant braid knotted at the nape of her neck, and she knows how to smile sweetly.
With the deadliest of sharks.