The history of Eorzea has been marked by a cycle of prosperous "Astral" and disastrous "Umbral" eras. Now the land stands poised to enter another age of decline, a period known as the Seventh Umbral Era. On the eastern border, the Garlean Empire masses its troops for invasion, while the native beastmen tribes summon their deities.

Since time immemorial, the planet of Hydaelyn has seen the births of lives uncounted. But the land now bears grievous scars, and threatens to slip into a gaping maw of death and darkness.

In the Armoury System, changing your adventuring style—or class—is as simple as changing what you hold in your hand.