Under the neon lights of the bustling city, there is an undercurrent. A seemingly ordinary secret room murder case reunited Lu Chen, the unruly captain of the criminal investigation team, and Gu Yan, a defense lawyer known as the "Invincible Myth" - they were once classmates in the police academy, but they completely broke up due to an unjust case ten years ago.
Lu Chen firmly believed that the "murderer" pointed to by the evidence chain was the real culprit, but Gu Yan defended the suspect with an almost paranoid attitude. The two had repeated confrontations in the court and at the crime scene, but after tearing apart the layers of disguise, they discovered that this case was just the tip of the iceberg. From serial corpse dumping cases to transnational organ smuggling, from the overturning of old cases to the shady stories of high-level officials, every time they get closer to the truth, there is a fatal threat.
The unjust case ten years ago is like an underground river, entangling the fate of the two people again. When the boundaries between justice and humanity are constantly tested, and when the definition of "justice" begins to blur, can they put aside their past grudges and redeem each other on the edge of the abyss?
