Jiang Yi is just an ordinary junior student. His biggest worries are papers and part-time jobs. He only knew that his sister "died in the line of duty" three years ago and left behind a rusty old badge.
Until late that night, on the last train of the subway, he encountered a monster from outside the territory - the You clan. At the critical moment, his sister's badge burst out with blazing light, saving his life and allowing him to see the world hidden behind the bustling city for the first time.
It turns out that cracks appeared in the earth's space barrier fifty years ago. The You clan come across the gap, hide their bodies, devour human souls, and disguise themselves as our neighbors, colleagues, and relatives. In order to fight against them, China formed the "Border Night Watch" organization to guard the country with flesh and blood, silently guarding the lights of thousands of families who did not know it behind them.
And my sister was a night watchman who died in battle.
In order to find out the truth about his sister's sacrifice, Jiang Yi joined the Night Watch. He awakened the "Breaking Nether Eye" left by his sister and was able to see through the disguise and weaknesses of the Nether Clan. From the dark alleys of the city to the borderlands, from recruits to generals, he stepped into this life-and-death war that lasted for half a century.
But what he doesn't know is that behind his sister's death, there is a traitor within the Night Watch; behind the space crack fifty years ago, there is a huge conspiracy on a global scale; and the real enemy of this war is a terrifying existence that can swallow the soul of the entire earth...
"With my flesh and blood, I guard the gate of the country; with my broken body, I guard the lights of thousands of families. We are the light in the darkness, and we will not rest until death."