A modern man opens his eyes in the body of Min Mu-jil—brother-in-law to Yi Bang-won, the most ruthless power seeker of early Joseon.

In a court where even blood ties offer no protection, in-laws are the first to be eliminated.

And he has just become one of them.

Surrounded by conspiracies, factional warfare, and inevitable purges, survival is no longer a choice—it’s a necessity. One wrong step, and his entire clan will be erased from history.

But he holds one advantage no one else has: knowledge of the future.

From the fall of powerful figures to decisive turning points in Joseon’s rise, he begins to maneuver through deadly politics, shaping events from the shadows. Assassinations, military reforms, territorial ambitions, and royal succession struggles—each move brings him closer to power…

Or closer to death.

Because history isn’t so easily changed.

And in a world where loyalty is fleeting and power is absolute—

Even knowing the future may not be enough to survive.