Natsu and Happy make a pilgrimage to Tenroujima, site of Mavis Vermillion's grave. This sets the stage for the origin story of Fairy Tail, with a six-year-old Mavis caught in the middle of a bloody war between two guilds on the island.
That's what happened on 
Tenroujima in the year 679.
ذلك ما حدث في تينروجيما عام 679