In 2099, global sea levels rose wildly within 72 hours, swallowing up land.
When Gu Chenzhou woke up, he was lying in a deep-sea experimental cabin. Instead of sunshine outside the porthole window, there is a school of fish—and a floating corpse tapping on the window.
AI told him: Surface civilization has ended, and the remaining humans are all scattered and dormant in deep-sea bases, and you are the first base commander to be awakened.
The darkness under the deep sea is not really dark.
Those missing submarines, abandoned drilling platforms, broken points of submarine optical cables... There are things moving around.
They are not living things, they are a form of cognitive pollution known as the "deep black tide".
Anyone who looked directly at it for more than three seconds heard the same voice: "Get down."
But Gu Chenzhou had no choice.
The base's nuclear reactor can only last for thirty days, and the food chain circulation system is on the verge of collapse.
He must dive to the "life forbidden area" at 8,300 meters - to activate the last energy matrix of mankind.
The surrounding matrix has been transformed by the "tide" into an upside-down city that grows in reverse.
Even more fatally, he detects a signal in the center of the city.
That signal repeats one sentence over and over again in human language:
"Welcome back, Gu Chenzhou. You are seven years late."
