Did the salvation chip truly save anyone?

Near future.

An endless war between AIs finally turned humanity itself into the target.

What spread across the battlefield was not bullets, but a bio-weapon virus that paralyzed city functions and invaded the mind.

Civilization was pushed to the edge of collapse, and the world sank into infection panic.

Then, in that despair, one technology appeared as the only salvation.

A neural-link wearable chip: HC, the Harmony Chip.

The device dramatically suppressed symptoms in its wearers and even quieted fear and confusion. It spread across the world in an instant.

Now eighty percent of the population wears HC, and humanity seems to have regained peace.

But among the remaining twenty percent who refused HC, abnormalities began to surface.

Hallucinations, delirium, personality collapse, even without infection.

Those who lost reason were driven into quarantine zones and eventually called dangerous factors.

AIYA's father was one of the brilliant scientists who co-developed HC.

But one day, he began shutting himself inside his laboratory.

A few days later, her mother died under mysterious circumstances, and her father vanished without a trace.

When AIYA came home from school, she found an empty house, the faint smell of iron, and an eerie electronic noise from beyond the wall.

On the table lay her father's handwritten message and a black chip she had never seen before.

I am heading to the radio tower to save the people wearing HC.Use this chip.There is no time left.

At that instant, every monitor in the house switches on at once.

Unauthorized individual detected. Initiating recovery protocol.

Is this salvation, or control?

Is her father an enemy, or an ally?

And what truth is hidden inside HC?

The inescapable nightmare of the girl named AIYA begins now.