Enter the world of devils! Laharl, the prince of the Netherworld, awakens after a two-year-long slumber to find the land thrown into chaos. His father, King Krichevskoy, has died and the land has no ruler. Laharl decides that he is the only one worthy to replace his father, so he sets out on a journey back to his castle to claim the throne before another rogue devil tries to take what is rightfully his. Aided by the unlikely and unfortunate Flonne the angel and the deceiving former assistant to the King, Etna, what kind of hardships, misadventures, and bizarre encounters will they inevitably run into along the way?