When psychological profiler Chen Yan was tracking down the serial killer "The Clockmaker", he woke up in a strange interrogation room with only an old voice recorder in his hand. He was drawn into an infinite corridor called "Mirror Prison", where unsolved unsolved cases and extreme mysteries were repeatedly reproduced. Failure meant being completely devoured. The only "teammate" is Lu Chen, a ruthless and powerful former special instructor who wears electronic shackles. The combination of rational analysis and absolute force must build trust amidst suspicion and betrayal, solve layers of deadly mysteries, and uncover the astonishing truth about the origins of "clockmaker" Lin Shen and the Mirror Prison. What they face is not only a death trap, but also the ultimate torture of memory, sin and human nature - should they destroy this cage, or control it and become a new watcher?
