Fairy Tail - Season 8 Episode 1 -

During their training journey, Fairy Tail members Natsu and Happy travel to Sirius Island to search for the grave of their first master Mavis, and happen upon the ruins of an abandoned town. In a flashback, the six-year-old Mavis is shown living in this town as an orphan and servant at the Red Lizard guild. The guild's members are cruel to Mavis, particularly their master Zeeself and his pampered daughter of Mavis's age named Zera, but Mavis perseveres. One day, Red Lizard enters a turf war with the rival guild Blue Skull. Zeeself and the rest of the villagers are killed while Mavis escapes into the forest with Zera. Touched by Mavis's kindness, Zera offers her friendship to her before collapsing, seemingly lifeless. Seven years later, a group of treasure hunters—Yuri, Precht, and Warrod—reach Sirius Island in search of a coveted jewel called the Sirius Jade.