A hundred years after the disaster, humans hid in the fortress city and used pollution values to determine whether a person was still a human being. If the pollution value exceeds 90, it is the red line. Above the red line, people are no longer considered normal. Chen Ye, a low-level escort, just wants to accumulate enough qualifications, get an official escort license, and leave the red line area. But he was born with the ability to hear the residual sounds in the pollution. A strange food escort sent to Platform 7 led him to meet a red line master with a pollution value of ninety-six. Everyone said it was a monster, but Chen Ye heard him waiting for a cold meal.
