A 21st-century civil servant travels back in time to ancient times and becomes a minor banner officer on the southwestern border of the Yong Kingdom.

He awoke from purgatory to find himself a death row inmate who had betrayed his country.

He managed to escape, but then became an undercover agent for an enemy country.

The long night stretched endlessly, a double agent at work.

From a frontier hell to the abyss of imperial power,

In this endless night where lives are at stake,

Watch as he carves a path to survival on the tightrope of lies and betrayals, step by step, ascending to the pinnacle!

Starting position: A lowly flag officer in the Jingbian Division.

Ending: Awake, I wield power over the world; drunk, I rest on the lap of a beauty; above the throne, I am the only one who reigns supreme!

Lin Xuan: All I want is to have a class, why are you forcing me?