Fam and friends return to Kartoffel after their long absence. The joy of seeing everyone safe and sound again turns to shock as Fam sees what has happened to the town.

Millia and friends have an audience with Augusta Sārā in the capital city of Morvarid.

The Ades Federation’s 3rd and 4th Fleets advance on the key strategic land of Boreas. A decisive, multi-fleet battle over Augusta Sārā ensues. Millia takes command of her fleet, while Fam and the Sky Pirates take to the air in armed Vespas.

Dio and Alvis meet up with the Joint Forces at Boreas and lend a big helping hand. But their joy is interrupted when Fam's group spots Ades' 1st Fleet while on patrol.

Upon hearing Sārā's wish, Admiral Sadri agrees to peace. A meeting takes place between Luscinia, Liliana, Sārā, Millia, Vasant, and others.

The truce has fallen apart. Before leaving, Luscinia tells Fam, "Be there to support Princess Millia."

After abducting Augusta Sārā, Luscinia activates the Grand Exile.

Fam and Giselle reach the furthest depths of the Grand Exile. There, they find Luscinia, holding a sleeping Sārā.

While Lavie recovers from her injuries on the crashed Silvana, she dreams of her childhood with Claus, whose family moved to Norkia and became neighbors with Lavie's. Their fathers, Hamilcar Valca and Georges Head, immediately became best friends and teamed up as a vanship pilot and navigator. Claus's mother, Justina, took care of Lavie as if she was her own daughter. Valca and Head taught their children to fly a vanship and assigned them mock courier missions. Lavie recalls her father's two friends, a male vanship pilot and a female navigator, but cannot remember their names. One day, Valca and Head received an assignment to cross the Grand Stream to deliver a peace proposal to Disith and left with their two friends. However, Valca and Head lost their lives in the attempt, and Justina died not long after. In a separate dream, Alex Row sees the two vanships in the Grand Stream. After they were orphaned, Claus and Lavie began training to fly a vanship. They were eventually forced to sell their house to save the vanship and began training for courier missions. When Lavie finally awakens, she finds herself crying from the memories. Dio and Alister finally locate Claus and Tatiana near the field of Disith migration capsules. Claus is reunited with Lavie and informs her that their hometown of Norkia has fallen to Disith.

Exile indiscriminately attacks both the alliance and Guild as they approach the ship, forcing the alliance fleet to fall back so that they do not lose more ships. Claus rendezvous at a fueling station in the Dragon's Fangs and makes the journey to the Grand Stream, switching vanships and navigators after each leg until he is reunited with Lavie. On the way, Claus dogfights with two Guild fighters, destroying them with Tatiana as his navigator. When Exile receives a pulse signal, it begins to retreat from the Grand Stream towards Disith, followed by both fleets. At the Casino Royale, the last checkpoint before the Grand Stream, Claus and Alvis reunite with Lavie, who holds the message tube containing the final Mysterion. They fly together in Claus's and Lavie's vanship, whose body has been reinforced for the journey in the Grand Stream, but are intercepted by Dio, who has run away from the Mad-thane residence in a separate vanship.

The episode starts with Tatiana who flies with her Vanship inside the Grand Sream looking for Disith ships as they prepare for a confrontation. Meanwhile, Claus and Lavie vanship two pilots are preparing for a race. Before qualifying races however Claus and Lavie decide to take a job. They must deliver a message to Duke Madossein by his wife. In addition they also choose to personally hand over a message from her daughter. Madossein Duke is a master of the fleet Anatory, so Claus and Lavie are forced to deliver a message in the middle of a firefight between Anatory and Disith vessels. In the clash we see Fusilier Moran for the first time in action. The episode ends with Claus and Lavie who climb on the ship the commander Duke Madossein.

Just as Claus and Lavi deliver their message to Duke Madossein, The Guild is hit. Duke Madossein instructs everyone to get to safety, and Claus and Lavi are escorted to their vanship. However, just as they are about to leave, Claus remembers he still has his letter from Holy. Lavi rigs the PA system in order to read it to the Duke and everyone else on board. However, this could be cut short as the first officer send guard to stop Claus and Lavi. But the guards aren't the only ones heading for Claus and Lavi, as Mullin Shetland is touched by the words from the letter.

The race is on! Claus and Lavi enter in a race, that they've entered so many limes before. But this time is different. They hope to finish the race, and they almost do (in 1st place too), but they are hit by a renegade vanship delivering ""cargo"". They soon learn that the ""cargo"" is actually a little girl. Claus decided to take the mission and is told, by Ralph, not to run his engine because the people after the girl can detect it. Just as Claus and Lavi leave the enemy vanship approaches. Now Ralph must make the ultimate sacrifice so that Claus and Lavi can escape with the little girl.

Alex kills the pilot of the star-shaped ship and takes Alvis on board the Sylvana, leaving Lavi and Claus behind. Claus repairs the vanship and obtains extra fuel from the downed ship nearby. He and Lavi then follow the trail of the Sylvana, for Al's sake. Al wakes up on the ship and meets Sophia. When the vanship catches up to the Sylvana, Alex allows the ship to fire upon them, but they are able to avoid getting hit and they ""crash-land"" on the Sylvana. They encounter mechanics in the hanger, and Claus is beaten up by one of them for fun. However, Tatiana and Alistia show up and Tatiana grudgingly asks for Claus' name. Lavi helps Claus up to the bridge, where they meet up with Alex again. At that point, Claus' injuries get the better of him, and he falls unconscious.

Dio and Luciora investigate their downed star-shaped machine. When Luciora fixes the camera on it, they are able to see an image of Alvis being protected by Claus. Tatiana and Alistia arrive at the palace of the emperor and inform him that the "cargo" is safely aboard the Sylvana. And speaking of the cargo, Al explores the ship on her own, making it down to the hangar, where the mechanics entertain her until Sophia retrieves her. Sophia brings her to Claus and Lavi, and later brings the still injured Claus to see Alex. Their talk is interrupted by a red alert claxon. The Guild is about to attack the Sylvana. In the course of the attack, one of the star-shaped machines comes aboard the ship and goes after Alvis. It's destroyed by one of the mechanics, and unfortunately ruins Claus and Lavi's vanship. Claus offers to fly and fight and the mechanics give him a quick review of combat flying. Another star-shaped machine comes on board, and the last scene is Claus, using his vanship, to shov

Ten years ago, the first Grand Race was held. A young Fam and Giselle cheer on Atamora as he competes in the championship race.

Claus and Lavi are back at their home, with Alvis sleeping on their bed. Claus has decided to take the mission, much to Lavi's annoyance. Alvis awakes and asks for her nanny, Gita but the woman died during their escape. Claus isn't sure how to handle it, but Lavi tells Al that Gita had to go away for a while. After eating, they settle in for the night, but the star-shaped ship finds Al in the house. Claus and Lavi have to escape, and their house is destroyed in the process. Although they don't use their engines in the waterway, the star-shaped ship still finds them. They narrowly escape, appearing to damage the star-shaped ship enough to do so. At the temple ruins, where they were to bring Al, they are attacked again and the star-shaped ship snatches Al. Claus tries to fight it with a rock and is knocked out. Just as he is about to be killed, a shot rings out. Alex has shot the pilot of the machine and saved all the children.

In a brief flashback scene, we are shown Tatiana's parents and given a glimpse into the surly vanship pilot's past. Tatiana and Claus manage to crash land, but the pipe which has the flow of claudia going through it is damaged. They can't fly unless it's repaired. Tatiana is devastated by her failure as a pilot and for a while, doesn't seem to care about anything. Claus manages to snap her out of her fugue, insisting that the Sylvana has survived the battle. They talk and Claus learns about Tatiana's left behind noble past, while Tatiana learns of Claus and Lavi's famous dads. Together, they manage to shorten then pipe system so that the claudia can at least flow through it. However, they give up height, and are only able to hover above the ground. Meanwhile, in another flashback scene, we see what appears to be the people of Dusis , fleeing the inclement weather of their country. However, the rockets which they use to fly are not balanced properly, and they crash. Tatiana recalls th

To help Millia rebuild Turan, Fam decides to steal a legendary ghost ship known as Sylvius the Reaper, a ship that is said to have single-handedly destroyed an entire Ades Federation fleet. With so few details to work with, though, it won't be easy.

The final target was the Anshar, the flagship of the Ades Federation's 1st Fleet. Now that their agreement with Tatiana has been fulfilled, Giselle prepares to leave the Silvius... but without Fam.

Following Claus and Lavie aboard the Silvana, Dio and Lucciola allow themselves to be captured. At the Anatoray capital, the Emperor begins to distrust Alex's actions and sends the Urbanus to retrieve Alvis. Alex interrogates Dio, who tries to gain his trust by telling him that the Mysterion passed by House Eraclea. He also reveals that the three Guild houses holding the remaining Mysteria have been purged by Delphine. Vincent Alzey, captain of the Urbanus, requests to meet with Alex. Alex asks Claus to fly escort for his flight to the meeting, to which Tatiana objects. Alister defies Tatiana and offers to be Claus's navigator. Alex informs Vincent that he will not hand over Alvis and will fight to keep her aboard. Dio and Lucciola meet Lescius, the Silvana's chief engineer and a former member of the Guild. Dio then finds Alvis by herself elsewhere and reads her one of the Mysteria, after which she falls into a trance and wreaks havoc on the ship's systems.

Princess Liliana is sent to Iglasia with instructions for defending the royal city from the Federation assault. Meanwhile, Princess Millia readies a surprise attack of her own, but little does she know Luscinia has a trick up his sleeve too...

With her kingdom now under Federation control, Princess Millia finally begins to understand what it means to be a Sky Pirate. Fam also reveals details about her past and her dream for the future.

In the hope of capturing their next battleship, Fam and company visit Eldorado, an amusement center where underground Vanship races are held.

The Silvius finds itself face-to-face with the Ades Federation's 1st Fleet, which had been silently tailing Fam and Giselle.