The elderly woman and her companion in white lab coats hastened to step inside.
"Boom, boom, boom…"
The metal door closed tightly once more.
The old professor, ignoring the sparse greetings from the surrounding researchers, led the elderly woman straight to his office.
"Doctor, next, I'm going to tell you about the most core secret," he said, turning around and staring intently at the elderly woman, "This secret involves a scientific research plan relating to the life and death of our human race, a project that has spanned five generations and taken two hundred years, conducted by myself, my teacher, and his teachers before him. Code name—S9999."
"...Why have I never heard of this?" the elderly woman's eyelids twitched.