Suspended criminal police officer Lu Chenyuan and young police detective Zhao Lingxiao team up to solve the case. At the seemingly unsolvable murder scene, Lu Chenyuan turns the case around with a grain of dust. Forensic doctor Su Wantang hid his testimony, veteran prison guard Li Jianguo hid the deceased's belongings, and detachment leader Zhou Mingyuan secretly obstructed the case - each witness carries his own secret. Lu Chenyuan had to peel off lies from the slightest clues, while Zhao Lingxiao discovered while chasing the real murderer that his father's death had the same origin as the family murder case twenty years ago. The truth is like dominoes. If you knock down the first domino, no one can escape intact.
