Celestia was too confident when she tried to fight Chrysalis, and the people have started to loss there belief in her. She hoped that she would have enough time to recover before the next threat appeared, but she was wrong. With no one to defend Twilight in case things turn to the worse, Luna is forced to find those capable and familiar with the threat at hoof.

The good news is she found help from Eorzea's greatest Free Company. The bad news is that Company's so-named "Warriors of Light" are not happy about being dragged into it all.

Hey, at least they seem to know what they're doing, right?

Major Spoilers for Final Fantasy XIV up until 3.4.
Takes place at the start of season 3