Inside and Outside

Yuan Li, a young policeman who was born with a birthmark on his mouth, dreams of being transferred to the mysterious border criminal investigation team. He thought this was just a career challenge, but he didn't know that he was stepping into a world that had been hidden for thousands of years. Here, under the neon lights and laws "inside the border", there are ghosts and secrets originating from "outside the border" lurking. A well-planned tunnel attack, a eloquent Napoleon short-legged cat "900 Million" delivered as a birthday gift, and his best friend Wan Zhou's extraordinary skills that cannot be explained by common sense... A series of events are like sharp keys, beginning to pry his true identity tightly sealed by ordinary life. The remnants of the ancient war god Chi You are ready to move in the darkness, and Yuan Li is the "key" they are looking for to recast or break all seals. Under the guidance of his father, brother and the mysterious "office", he had to wander around crime scenes and the edge of the supernatural as a policeman. In the process of solving bizarre "cases" one after another, he gradually pieced together his own extraordinary destiny. From a criminal investigation elite to a "key keeper", every time he goes out to the police may be a demon subduing; every disappearance he pursues may involve a thousand-year grudge. When the familiar police badge intertwined with unfamiliar runes, Yuan Li had to answer: Whose shield is he, and whose sword is he?