In the prosperous city "Tianyuan City" where technology and martial arts are intertwined, there are two worlds. One is the order in the sun, guarded by the Wuhan Bureau; the other is the balance in the shadows, controlled by a mysterious "Night Lord".
Su Muyan, an ordinary to somewhat introverted student in the History Department of Tianyuan University, works daily in the library, cafeteria and dormitory. No one knows that when night falls, he is the "Lord of the Hidden Court" who controls the entire underground world and scares countless heroes. He was used to strategizing in the dark, and also enjoyed the peace and tranquility of the day.
Until a heroic female military security officer broke into his life.
Ling Qingxuan, the youngest genius captain of the Wuhan Bureau, leads the clues to Tianyuan University in order to pursue a strange case that disrupted the underground order of Tianyuan City. A seemingly unexpected "hero saving a beauty" made her notice this junior student who was "powerless".
One is a sharp sword that pursues darkness in the light, and the other is an abyss that protects order in the darkness.
As she approached the truth step by step and tried to uncover the mystery of the "Night Lord", she found that she had already fallen into a gentle net. And Su Muyan also discovered that protecting the balance of the world is far less important than protecting a person's smile.
When her identity is exposed, will she choose to fight against him, or face the turbulent urban world with him?
