Mu ErPu is Lord of JinLin's Second son. His name mean second jewel, Pu mean unpolished jewel.

He and his agnate brother, Mu YiZhen, must compete for become a rightful heir of JinLin.

Many years ago, YongJian, JinLin neighboring region, had turbulence in royal court. Because of this, Load of Yongjian pass away, his heir disappear and warlord battle for the throne.

JinLin reach out to Yongjian, send second prince, who have Yongjian royal blood with his mother, as a temporary regent. He ruled YongJian among some nobleman mistrust and his brother obstruction. But some YongJian nobleman support he to be new lord. Until, rightful heir of Yongjian come back. Suddently, his standing to be insecure.