Viernes has been defeated and only the Fire Dragon God, Ignia, remains. Natsu and his friends begin to search for the whereabouts of Ignia, only to find that he's actually the leader of a dark guild called Fire & Flame. And rather than having to find Fire & Flame, members of the dark guild come searching for Natsu at Ignia's behest. The Fire Dragon God has a plan for an ominous festival and he'd like Natsu to join!