The Evil King Valt, once ruler of the Continent of Darkness, is reborn as a human with his formidable powers intact after his defeat by heroes. Determined to conquer this new world, Valt catches the eye of skilled adventurer Iris. With Iris by his side, he joins the Royal Adventurer Training School, quickly outshining his peers with his unmatched abilities. Despite starting at the unheard-of 'level 0,' Valt leverages his Evil King talents to assert his dominance in this unfamiliar realm.