After the creation of the different dimensions, the supreme being decided to share his powers in the different dimensions. Those creations where called heroes also known as unquivalents.
On Earth where our Hiro BLACK KATANA resides, he fights with a villain called trido who has as objective to kill the supreme being and become the new creator.
Only to discover that our Hiro infact is the main driver of that evil plan and he wants to become the new equilibrant.