In Jiangcheng City in 2026, there is still a gap in criminal investigation technology, and case detection relies on traditional techniques and logical deductions. Shen Yan, a newcomer to the criminal investigation detachment, relied on his previous criminal investigation knowledge to catch a glimpse of the truth through clues. When he overturned the conclusion of "suicide" in a secret room suffocation case, he accidentally involved a black network of malfeasance within the criminal investigation detachment that spanned twenty years - captain Liu Yong's abnormal reaction, traces of alterations in the file, Su Qing from the Trace Inspection Section and encrypted news about the "fiber-related case"... The mystery is like staring into the abyss, and every step is startling.
From the mystery of the secret room to the reopening of the long-standing case, from the cross-provincial pursuit of the murderer to the final settlement, Shen Yan and Su Qinghe used evidence to uncover the power corruption and high-intelligence crimes behind the fake cases. The suspense hook at the end of each case connects cross-case evidence such as encrypted notes and industrial hemp ropes, pointing to a dark web that swallows the truth. In this confrontation with the abyss, can they tear apart the fog and let justice be reborn in the iron law of criminal investigation?
