In a strange massacre, the only survivor turned out to be the "living witness" deliberately left behind by the murderer. Former detective Zhou Hongying picked up a button in the rubble that did not belong to the scene - it was the "Corpse Sewer" symbol that pulled him down from the altar three years ago. When all the evidence pointed to his adopted daughter Shen Muyu, Zhou Hongying discovered that behind it were intertwined with police corruption, underground casino shady stories, and a psychological portraitist Su Jing with a dual personality. He must tear apart the murderer's last disguise with his own hands, and behind the forged truth, there is still a deeper darkness.
