In the Daqian Dynasty, under the night, the assassin organization "Tingjiange" that has existed for a hundred years is the Sword of Damocles hanging over the heads of all the nobles. In Tingjian Pavilion, Ling Suye, the top assassin codenamed "Xuanniao", has excellent swordsmanship, a heart as cold as ice, and has never failed. In his world, there was only the mission target and the only sound of the sword cutting through the night sky.
A seemingly ordinary assassination mission caused him to encounter the only "accident" in his life. Shen Qinghe, the youngest and most promising director of Dali Temple, is as tough and bright as a Qinghe that breaks out of the ground, vowing to sweep away the world's gloom. She was ordered to investigate a court murder case, but step by step she stepped into the trap set by Tingjiange.
He is a ghost walking in the dark night, and she is a hunter chasing the light. A carefully planned assassination turned into a deadly chase across the rivers, lakes and courts. When the cold sword edge collided with the hot sincerity, when the hatred rooted in flesh and blood intertwined with the uncontrollable love, Ling Suye began to waver. Is the "Tao" he believes in really the Tao? Are the "evils" he killed really unpardonable?
And when Shen Qinghe dug deeper and uncovered the bloody truth, she was horrified to discover that the "justice" she defended was actually covered in bones. The assassin she hunts may be the real executioner carrying justice.
Black and white are reversed, love and hate are reversed. In the chess game of fate, they are both pawns and chess players. How will this game with the world as its bet turn out in the end? Should the sword cut off love, or should we work together to subvert this bright world?