Shen Yi and Pei Yu are both excellent police officers and became partners because of a series of murders. On the surface, the two cooperate seamlessly, but in fact they are suspicious of each other because of their hidden pasts. In the process of chasing the murderer, they must not only fight against highly intelligent criminals, but also beware of the "shadow people" that may exist around them.
Shen Yi: The backbone of the criminal investigation detachment, with rigorous logic and meticulous observation. He participated in the border anti-drug operation "Abyss" three years ago and was one of the few survivors. He is obsessed with the whereabouts of the "goods" and firmly believes that there is something evil inside.
·Pei Yu: An elite criminal police officer transferred from the police force, he is calm and restrained, and is good at criminal psychology and scene reconstruction. The real background is a mystery, he knows the rules of the underground world well, and seems to be carrying an unknown mission of tracing.
Deputy CP Qin Zhaochuan × Shen Shixu
Intention: How can we dare to walk side by side into the darkness even when we can't see each other's full picture?