Zhang Meng, a girl who lives alone, is tortured by the noise upstairs. After purchasing earplugs that are said to be "absolutely silent", she falls into a strange time loop. When she puts on the earplugs and complains about who is making noise, the other person will die mysteriously. She pretended to have a neurasthenia to deceive the police, used ice to set up traps and used knives to kill people. She thought she was hiding the truth, but she didn't know that secret cameras had already captured everything, and she also transformed into a new "silent seller" and continued to harvest lives in the name of silence.
