Yanqiu, an ancient book restorer, received a Republic of China radio at a garage sale, which automatically played a murmur that no one could understand every midnight. He discovered that on the restored ancient scrolls, there were cuneiform characters with the same frequency as the noise. As the investigation deepened, strange murders occurred one after another in the concession: the eardrums of the deceased were covered with patina, and the chest was filled with radio parts. When Yanqiu saw the spiral of his pupils in the mirror, he realized that he had become a "tuner" and that the radio was the key to summoning the rulers of the past.
