Naofumi Iwatani was convicted of a crime he didnt commit. His sentence was a kin to torture, being locked in a cell of concrete and metal; forced to fight for his right to live. On the other side of the world, the Queen of Melromarc hears of the Shield Heros unjust treatment and sends her daughter -Melty .Q Melromarc- to put an end to it and stop the foolish sage king.