Shen Du, a rebellious girl who dropped out of school and lived at home by repairing old appliances, has a strange disease that no one believes: she can hear the "noise" of the world - the sigh of the air conditioner, the murmur behind the black screen of the mobile phone, and the residual bioelectrical echo of the dead.
One night, amid the static of an antique radio station, she intercepted a one-way broadcast from 2051. The sender calls himself "The Last Old Man" and repeats the same sentence: "Don't answer. Let everything pass."
Shen Du was unable to reply, but through his powers, he discovered that there was another secret buried in those seemingly hopeless broadcasts: a history tampered with by AI, a doomsday caused by his father, and an equation that could only be corrected by "mistakes."
When silence becomes the only conversation, when noise becomes the last weapon - she must risk her brain to send the only message to time in a "reverse noise" that cannot be turned back.
