Ordinary monsters will not harm ordinary people, except for - resentful spirits.
Wraith spirits are not ordinary monsters. Ordinary monsters are just like humans. They are just another species in this world. Ordinary humans cannot see monsters and have lived with them peacefully for many years. Wraiths are not, they are the product of a combination of demons with evil thoughts and human resentment.
Senior intern Shen Jiyu, who has been able to see monsters since he was a child, reunited with his first love He Moyi two years later, only to find that he had joined the monster-killing team. While being chased by monsters, Shen Jiyu met the mysterious and handsome Su Lin, who possessed strange powers. Shen Jiyu, who was worried that he would become a monster, had to start fighting monsters with He Moyi while trying to find Su Lin to solve the strange things that happened to him... However, he found that the barrier between people and monsters was gradually being broken down, and there were more and more resentful spirits that were originally rare.
There is basically a small story in the first three or four chapters. When the main plot comes out later, the small story may disappear and the main plot will be focused on...