I Ponder the Causes and Consequences, and Find the Culprit in the Smallest Details

Suspended detective Lu Chenyuan teams up with young investigator Zhao Lingxiao to solve cases. At a seemingly impossible murder scene, Lu Chenyuan turns the case around with nothing but a grain of sand. Forensic pathologist Su Wantang hides testimony, veteran prison guard Li Jianguo secretly keeps the victim’s belongings, and squad leader Zhou Mingyuan obstructs the investigation behind the scenes. Every witness has a secret of their own. Lu Chenyuan must peel away the lies using the tiniest clues, while Zhao Lingxiao discovers during the pursuit of the real killer that his father’s death is connected to the massacre of an entire family twenty years ago. The truth is like a line of dominoes: once the first falls, no one can walk away unscathed.