There is no Line 4 in Wufang City.
But on the last subway train Shen Moyuan boarded, the announcement said: Next stop, Sifang City.
Living passengers were not allowed to get off, and the dead had to buy tickets. Stranger still, a classified file showed that he had died at Central Station three years ago.
To find out who he really was, Shen Moyuan could only strike a deal with Meng Po, who lived in his shadow: he would devour evil spirits, and she would filter the memories of the dead for him.
A nonexistent station, two files that were both authentic, disaster missions rewritten by human hands...
When the forgotten Line 4 reappeared, Shen Moyuan finally discovered that what truly awaited his return was not the past, but Wangchuan, awakening beneath the entire city.