The Tenrou Island arc is the eleventh story arc of the Fairy Tail series. The time to see who's worthy enough to become an S-Class Mage descends upon Fairy Tail once again; the S-Class Mage Promotion Trial is about to begin. Makarov announces the competing Mages, and they pick their partners to help them pass the trial. However, only one contestant is allowed to pass this time round. Once they arrive, however, they soon find out that it is not just they who are on Tenrou Island, but another third of the Balam Alliance: Grimoire Heart. On top of it all, a mysterious youth is wandering on the island, killing all who crosses his path. The war between the Fairies and Demons begins.