Twenty-eight-year-old Duanmuyu is the top "Speaker of Binding" in the city. His words can sneak into the most fragile gaps in people's hearts. But he never accepted the job of "speaking" - until his mentor died mysteriously, leaving behind a last word: "Find the buyer who never makes a sound." During the investigation, he met Xin Wu, a mute woman who can erase all sounds. One kills people with words, and the other makes the world speechless. When the legend of the "Seventh Taboo" spread from the dark depths of the city, they discovered that all the silences were pointing in the same direction.
