Dragon Cry is a magical artifact of deadly power, formed into a staff by the fury and despair of dragons long gone. Now, this power has been stolen from the hands of the Fiore kingdom by the nefarious traitor Zash Caine, who flees with it to the small island nation of Stella. Frightened that the power has fallen into the wrong hands, the King of Fiore hastily sends Fairy Tail to retrieve the staff. But this task proves frightening as a shadowy secret lies in the heart of the kingdom of Stella. Dragon Cry follows their story as they muster up all their strength to recover the stolen staff and save both kingdoms.

[Written by MAL Rewrite]

Haruka Nanase has reconciled with his rival Rin Matsuoka, and they have re-established their friendship, determined to race each other again. Now Haruka, along with Makoto Tachibana, Rei Ryuugazaki, and Nagisa Hazuki, prepare for their upcoming tournaments, determined to compete wholeheartedly and achieve victory as a team. At Samezuka Academy, Rin resolves to do the same. Further, the seniors near graduation, and Rin has decided his future plans. However, Haruka and Makoto remain uncertain, and they begin to feel the pressure of having to choose their own paths. [Written by MAL Rewrite]

Rin Matsuoka’s childhood friend, Sousuke Yamazaki, has recently transferred to Samezuka Academy. Upon their reunion, the two reminisce about their childhood days and reaffirm their wish to swim together. Now with Rin, Sousuke, Captain Mikoshiba’s younger brother Momotarou Mikoshiba, and hard-working Aiichirou Nitori, the Samezuka relay team is formed, and their friendship deepens. However, as tournaments, races, and training go on, the reason for Sousuke’s sudden return begins to trouble him and affect his swimming. Noticing Sousuke’s change, Rin pushes to uncover what is holding him back. [Written by MAL Rewrite]

The year is 2148. Two years after the end of the original Fafner in the Azure TV series, Tatsumiya Island and its surviving residents have returned to some semblance of recovery. However, things have become desperate for our hero, Kazuki; nearly blind now, and partially crippled from his battles with the Festum two years earlier, he clings to the promise his fallen friend Soushi made to him to return to the island and set things right again. Kazuki's hopes flare when a lifeform is detected within an unmanned submarine that comes floating into Tatsumiya Bay one night, but the person aboard isn't Soushi; it is a mysterious "boy" named Misao Kurusu who may not be entirely human, and who claims to have been sent by Sōshi. With Misao's arrival, hostilities break out anew between the Human Army and the Festum, and the Fafner pilots are thrown into the most desperate battle of their lives - this time, with the fate of TWO races riding on their shoulders. 

(Source: Wikipedia)