Hareta, raised in the wild by Pokémon, decides to become a Pokémon trainer and sets out to find the legendary Pokémon Dialga, but time is of the essence as he must find it before the evil Team Galactic does.

Teen exorcist Allen Walker is given his first assignment, and his perilous mission takes him to southern Italy, where an Innocence has located. Along with fellow exorcist Kanda, and Tom, a "finder" --one of a support group for exorcists--Allen must vanquish the akuma that covets the Innocence.

Hareta's fight against Team Galactic continues, as a mysterious girl challenges him to battle, and Team Galactic reveals their ultimate warrior.