Thirteen years ago, a Tower pierced the skies—and nothing was ever the same.
Ha-jin is an ordinary young man struggling to survive in modern Seoul. Between part-time jobs, taking care of his little sister, and constantly worrying about the future, his life is anything but easy.
But on the night he turns twenty, everything changes.
Ha-jin wins an invitation to the Tower—a mysterious, otherworldly structure where those who climb can gain unimaginable power, wealth, and even godhood. Nobody knows why the Tower chooses who it does. And Ha-jin? He never thought he was special.
But the Tower did.
And once you’re chosen... there's no turning back.