The sudden invasion alert sounded like a sharp blade slicing through the usual tranquility.
The alarm was piercing and urgent, echoing between the cold corridors and sealed laboratories.
The lights instantly turned to an emergency red, flickering uncertainly, adding a hint of apocalypse to this sudden tense atmosphere.
The staff inside the base, whether the researchers in white coats or the analysts busy with data monitoring, all stopped their work immediately.
A trace of astonishment flashed across their faces, but their well-trained demeanor quickly returned to calm.
Following emergency procedures repeatedly drilled countless times, they immediately secured and protected the current important data and class D materials.
Simultaneously, security personnel emerged from the shadows and quickly assembled.