Dantalion and Sytry must return to the netherworld when the four Kings of Hell come together for their annual summit.  None among the crowd realize that the Grand Duke Baalberith has secretly sent a horde of demons to the human world to kill William, the Elector who inherited King Solomon's soul.
And what about you? 
Why did you call me here?
¿Y tú qué? ¿Por qué 
me has interrumpido?
¿Y tú qué? ¿Por qué 
me has interrumpido?
Ah, chega, por que me 
interrompeu, afinal?!