Step Aside, I Am the True Rap King

DramaBox synopsis

Betrayed by his wife and protégé, legendary Rap King Zane is presumed dead after falling from a skyscraper. He returns as "Zero," a stuttering janitor at an underground rap club. When the club and Chloe, the woman who saved him, are threatened by powerful corporate forces, Zero steps back into the rap battle scene, fighting his way to Madison Square Garden to reclaim his name and avenge those who stole his life.