After the Demon Lord is slain at the hands of a lone human warrior, humans rejoice over the end of his reign of terror. But an intense tournament of powerful fighters hoping to be crowned the next Demon Lord has drawn in the unlikeliest of contestants--Helck, who claims to hate humans but is one himself! How will Helck change the course of the war between demons and humankind?

Once Helck finishes the unbelievable tale of his loss and betrayal, he pleads for Vermilio to accept his one request. To return his trust, Vermilio reveals her true identity--a secret that she had believed would keep the Empire safe. Meanwhile, the new Demon Lord's castle is under siege by a group of awakened human soldiers!