The time is 2500 years.
The sudden appearance of dark matter completely changed the earth, forming demon lairs (commonly known as dungeons).
Modern weapons are almost useless against dungeon monsters, and the only means are technologies developed passively or actively by the human body to convert life energy into supernatural phenomena, so-called psionic powers.
In order to fight against the monsters that attack humans every day, extraordinary education has become a very common practice around the world, and warriors who specialize in conquering monsters, commonly known as "dungeon hunters", have also become people's yearning.
Among such powerful dungeon hunters, there is one who is highly regarded.
A warrior of unknown age, unknown real name, and unknown background, named "Qianlong".
No one knows the true identity of the man touted as the world's strongest warrior.
However, he became truly the best hunter in the world. However, he announced his retirement after only three years and suddenly left the world of hunters.
Meanwhile, a boy shows up at Kunlun Academy, a hunter training school in China.
He has no powers and looks very ordinary at first glance.
But his true identity is...
