Many centuries after a series of mass planetary attacks across the polymundus (the combination of all universes), a young human boy finds himself thrown into a mistaken affair with an evil demonic prince known as Dante, the sole survivor of the Umbratrix demonic race. In a mixture of unusual fate, Dante proclaims the boy Navis Virgo (Death Container); or the vessel of his dead brother's reincarnated strength. He views the boy as a tool, and out of avid greed and desperation, kidnaps him from not only his home, but from his planet as well and eventually trains him: a shy, bullied, average-school-geek, into a deadly demonic assassin with a hot-head and a cold-blooded temperament. Yet unannounced to Dante's own knowledge, the boy's destiny goes further than becoming Dante's enslaved tool towards universal domination; he instead has the making to become the universes' #1 savior and is revealed to a most shocking truth about his own inner strength which become rival to the legendary, long deceased King Aijika Umbratrix XI, Conqueror of Worlds.