The Sunken Realms
It is The Age of Repentance.
All time before this era began has become known as The Age of Regret.
Approximately a hundred years before our story begins, a great Calamity took place, in which a Great Old One was summoned into the material plane. After decades of conflict, the Great Old One was banished, leaving in his wake a world half-destroyed, dragging the majority of the Known World into the ocean's depths, leaving in its place The Sunken Realms.
Who were you, then?
Who are you, now?
And who will you become?