They gave him a broken fiefdom and a death sentence. He'll give them an empire in return. When Kaito Tanaka, a military strategist deemed too ruthless for the modern world, wakes up as Kaelan von Greyrat, he knows he's been handed the worst deal imaginable. His new family despises him, his soldiers mock him, and a barbarian horde is weeks away from slaughtering them all. But Kaelan has a secret weapon: a System that rewards brilliant tactics with unimaginable power. While knights prepare for a glorious last stand, Kaelan plays a different game. He fights with blackmail instead of blades, with economics instead of armies. Every humiliation becomes a strategic advantage. Every "coward's move" makes him stronger. Soon, the nobles who laughed at him will beg for mercy, the barbarians who sought to crush him will flee in terror, and the kingdom that abandoned him will kneel at his feet. But Kaelan's rise attracts attention from powerful forces beyond his understanding. Other players in this deadly game have been transported to his world, each with their own terrifying abilities. To survive, Kaelan must uncover the truth behind his transmigration and face an enemy who knows all his tricks, because they play the same game. He was given nothing. He'll take everything.