Under the undercurrent of modern cities, secret martial arts, killer organizations, ancient martial arts families and capital tycoons are intertwined with each other. Cheng Ran is the only descendant of the Master of the World-Destroying Sword. After his master died, he returned to the city with only a black sword and seventy-two moves, but was hunted down on a rainy night. His best friend Xia Tian was seriously injured to protect him. In a desperate situation, Cheng Ran understood the first song of "Seventy-two Songs of World Destruction": No Moon. From then on, every time he was close to death, he would be forced to come up with a stronger song; every time he drew a knife, it would bring him closer to losing control. In order to find out the cause of his master's death and protect the old man, Jasmine and the only people around him, Cheng Ran stepped into the deepest part of the modern martial arts world, until he discovered that what the Seventy-Two Songs really wanted to destroy was not the world, but the dark order that controlled the fate of all people.
