Natsu interrupts the fiery battle between Igneel and Acnologia to ask his burning questions, but his former foster father gives him a task instead of answers: to steal the Book of END from Mard Geer.

Lucy is a wreck after giving up Aquarius forever in exchange for a one-time summoning of the Celestial Spirit King, who then takes on Mard Geer, the Underworld King. And Lucy finds she doesn't have ...