The Laughing Man returns! And, just as he did six years ago, he kidnaps the president of Serano Genomics without being detected. Section 9 arrives at Serano's house too late, and sets out to find him.

A seemingly run-of-the mill hit-and-run turns into anything but when Togusa investigates. While in Tokyo, he discovers a secret from the past the GSDF is trying to keep hidden deep underground.