71% Of the earth's surface is ocean, but mankind's understanding of the deep sea is not even as good as the back of the moon.
A joint scientific expedition to the Mariana Trench accidentally touched a taboo that had been dormant for hundreds of millions of years. Submariner Qin Tao witnessed indescribable magnificent ruins and a huge "Eye of the Abyss" at the extreme end of the abyss. That gaze became a lingering nightmare for all survivors.
Five years later, the echoes of the abyss shook the world. Sea levels are rising strangely, marine life is mutating crazily, and unknown viruses are spreading among the population. In order to find the key to save mankind, Qin Tao, who was burdened with a "curse", was forced to return to the deep sea. However, what awaits him is not only the truth, but also the ultimate torture of the meaning of human existence.
When the ancient "Monitor" civilization awakened from the bottom of the sea, and when a new human race named "Sotaria" came riding the waves, the old masters were forced to retreat inland.
Evolution or destruction? Coexistence or war? Under the watchful eye of the abyss, the game between the two civilizations will determine the final fate of the earth.