It has been three years since Yuna, Rikku, and Paine saved Spira a second time, stopping Shuyin from firing Vegnagun and returning Tidus to the land of the living. For four years, Spira has seen the Calm, a time of peace in Spira. This is thought to be the Eternal Calm.

But some things are not as they seem.

Seymour is back, and he is more powerful than ever before. Having bonded with Sin right before Yuna could send it, he has become the New Sin. Around this time, people began to see pyreflies in the Ocean...Callie, a player on the Zanarkand Abes, is found off the coast of Luca, with blond hair and strikingly similar eyes, she begins the search for her twin brother. Meanwhile, Braska, Auron and Jecht have been returned to Spira, they have both been given a new lease on life, and plan to make full use of it to help defeat Sin.

Seymour is in Yevon, convincing the heads in charge to have him as Maester again...

Spira is going to change. Who will you side with?

In this eclipse, do you side with Power, or with the light? Yevon or the protective Summoners? The choice is yours.