After being transported to another world, Lee Kangjoon spent centuries fighting brutal wars, conquering powerful enemies, and mastering forbidden necromancy. Over time, he rose to become one of the most feared emperors in history, commanding endless armies of the dead and bending entire realms beneath his authority.

Having already achieved absolute power, wealth, and glory, Kangjoon eventually grows tired of endless battles and longs for something simple: peace.

At last, he manages to return to Earth, expecting to finally enjoy a quiet and ordinary life. But just when he believes his struggles are over, he is suddenly confronted with a challenge far more difficult than conquering kingdoms—

Raising a daughter.

Now, the legendary necromancer who once ruled over empires must learn how to navigate everyday family life, parenthood, and the emotional chaos that comes with caring for a child. Yet despite his overwhelming power, Kangjoon quickly realizes that being a good father may be the hardest mission he has ever faced.