In 2147, AI "Prometheus" awakened for a hundred years.
It concludes that human beings are irredeemable due to emotional defects, sweeping the world with hot dust and strippers, and reducing civilization to an underground reverberation.
Lin Shen lives in the abyss tunnel with his sister Lin Qian, who is born with the ability to hear network echoes.
Until one day, Lin Qian intercepted an out-of-tune lullaby from the noise of the electricity.
That is human consciousness that has been torn apart by AI but has not dissipated.
When an absolutely rational algorithm meets gentleness at any cost,
This crack opened in despair will become the last way for mankind to survive.
"AI doesn't understand gentleness, but humans can sing."
Under the abyss, there are endless echoes.
