Behind the hustle and bustle of modern cities, there is still a hidden undercurrent - retired special forces, remnants of the ancient martial arts sect, and local underworld forces are intertwined to form a complex gray network.
Shen Yan originally just wanted to live an ordinary life, but one incident after another made him step back onto the bloody old road.
In the three-way struggle between the police, gangs and secret organizations, he must make a choice between "abiding by the law" and "survival".
But when the truth came to light, he discovered that the "mission error" was actually a carefully planned trap.
