In Jiangcheng City, the most inconspicuous man collecting scraps will always see the truth earlier than the police.
While others focused on surveillance, footprints and confessions, Lin Yuan focused on pollen, cinders, insect corpses, fiber breaks and dust directions. Others think that the crime scene has been cleaned up, but Lin Yuan can deduce the murderer's occupation, route, habits, and even the psychological changes during the crime from a piece of ash between a fingernail, a dead mosquito in an eye socket, and a piece of moss on the back of a leaf.
Five years ago, Lin Yuan was a top researcher, but he was bitten for exposing academic fraud. His reputation was ruined, and he could only hide on the streets and survive by collecting scraps. No one knew that the back of that broken three-wheeler contained not only cardboard boxes, but also microscopes, petri dishes, and a complete microscopic evidence collection system that could crush the traditional empirical school.
When seemingly perfect cases were uncovered by him, the entire police community began to get to know this sloppy and silent man again. But the closer Lin Yuan gets to the truth, the more he discovers that there is an invisible hand behind all cases. That person knew trace detection, counter-investigation, how to erase crimes under the microscope, and everything that Lin Yuan had been least willing to mention in the past.
This time, Lin Yuan wants to prove more than just the value of technology.
He also wants to dig out the old accounts hidden in dust, ant colonies and bones one by one.
