On a rainy night, a body is found "hanged." Li Yu'an takes one look at the lividity and knows the victim didn't die here. He's the "master detective" of Jiangcheng's Criminal Investigation Team, meticulous and unhurried, and a single autopsy report can take him three days. The forensic pathologist's scalpel and the trace examiner's lights turn one supposed "suicide" or "accident" after another into irrefutable proof. There are no ghosts or gods, only the human heart.