With their strongest members gone for seven years, the Fairy Tail guild has become the weakest wizards` guild in Fiore, indebted to and bullied by Twilight Ogre, a new local guild. The remaining Fairy Tail members are visited by Ichiya and the Tri-men of Blue Pegasus, who tell them that they have recently discovered a change in the magical energy around the waters where Tenrou Island once stood. There they discover that the island was protected against Acnologia`s attack by the spirit of Mavis Vermilion, who used her power to help everyone on the island cast the defensive Fairy Sphere spell…