An anonymous post pointing to the 1980 "IC2A" special operations investigation report quietly appeared on the forum, and quickly became an Internet legend due to the strange "no trace" and global emergency ban...
A bizarre murder case, using the military-grade poison "Soman" in an almost impossible way, staged serial killings on campus. When the boundaries of criminal investigation were shattered by crimes beyond common sense, police officer Lin Yue followed the only clue - a note with "Mr. Du" written on it, and stepped into the depths of the fog. This is not only to solve the mystery in front of her, but also to unravel the unresolved knot about her father's death that has entangled her for many years.
And the anonymous poster seems to be using this bloody ritual to drag "Mr. Watari" and the dusty ghost of "IC2A" back to the real world...
