The Cursed Island

S class quests... Requests so dangerous only wizards that the master gives permission to go on them. And yet, Natsu, Lucy and Happy go off on one of these S class quests on their own without permission! They head out to "Galuna, the cursed island," and it turns out the people there are turning into demons from the evil spell of the moon! They learn that there is only one way to undo the curse, and that's to destroy the moon itself! But how in the world are they going to complete a request to "destroy the moon?"