During the day, he is a gentle and taciturn ancient book restorer in Tianhai City's "Buyuzhai", searching for the warmth of history among the dusty pages.
Under the dark night, he is the uncrowned king in charge of the order of the underground world - the master of "Youting", codenamed "Yuan". A word can determine life or death, and a thought can stir up the storm.
Lin Yuan was used to this kind of double life, until that thunderstorm night, a bizarre warrior murder case brought a heroic female detective into his world.
Su Qingying, an elite member of the "Special Case Team" of the city police station, has strong skills and vows to eradicate all evil hidden in the shadows of the city. Her keen intuition led her to turn her attention to the seemingly harmless ancient book restorer again and again.
When the righteous pursuer of light meets the ruler of darkness.
He is guarding an order she does not know; she is tracing the legend he created.
In this urban jungle built of steel and concrete and the undercurrent of Yuanqi, a dangerous game about protection, conquest and love has quietly begun.
He hid his edge, just to be the most ordinary mortal in front of her.
