Shen Yanqiu and Interpol Lu Tinglan jointly investigated the case and found that the deceased was imprisoned for a long time and was dumped after his death. The murderer kept setting up traps to frame the two of them. The clues point to the abandoned cold storage, and also involve the fire at Qinglan Welfare Institute twelve years ago. The unsolved old cases of Shen Yanqiu's missing sister and Lu Tinglan's father have surfaced. When the two tracked down the cold storage, the suspect set up a delayed arson to destroy key evidence, and the story was interrupted.
