Lee Yeon-hoo was born as the legitimate second son of the Iron Blood Family—a powerful clan that rules the northern Murim and stands as one of the Eight Great Families of the White Night Clan. Despite his noble birthright, he is ruthlessly abandoned and cast out by his own family, simply for being a potential obstacle to his older brother's path to succession.

Cast aside but unbroken, Yeon-hoo makes a vow:
"Watch me. Witness the world of the Iron Blood Family that this abandoned son will create..."

This is the epic tale of a forgotten heir's return. As he rises from exile to become an unparalleled monarch that no one dares to oppose, his roar across the Northern Heavens will make the entire world tremble.