Seasons & Episode
The first half of the episode covers Yang Wen-li's childhood, and eventual admission to the Free Planets Alliance Officer Academy on Heinessen following the death of his father. The rest of the episode covers the events of the Imperial attack on El Facil, and Yang's leadership of the civilian evacuation that earned him the title, "Hero of El Facil."
Yang Wen-li reviews the history of the Year 730 Mafia.
Yang Wen-li reminisces about his days in the Free Planets Alliance Officer Academy spent with Jean Robert Lapp and Jessica Edwards. He later meets with Alfred Rosas to discuss about the latter's past with the Year 730 Mafia and specifically the circumstances surrounding Bruce Ashbey's death.
The history of the Second Battle of Tiamat is chronicled. In December 745 UC, the Free Planets Alliance and the Galactic Empire clashed in the Tiamat Starzone. The Alliance Fleet under the overall command of Admiral Bruce Ashbey is composed of fleets led by members of the famed Year 730 Mafia. There are however signs of internal dissension right before the battle, threatening the morale of the fleet. In contrast, the Imperial Fleet, under the overall command of Fleet Admiral Zieten, is in high spirits, albeit being rather single-minded in hunting down Ashbey. Nevertheless, the battle starts with the Alliance fleet quickly gaining an advantage by succeeding in destroying Vice Admiral Wilhelm von Mückenberger's fleet.
Yang Wen-li attends the funeral of Alfred Rosas, and discusses the Year 730 Mafia with Alex Cazerne and Dusty Attemborough. Later, he reviews the fate of the Year 730 Mafia after the Second Battle of Tiamat. Before he can come up with any concrete conclusions however, he is notified of his new appointment in the planet Econia, which hosts a prisoner-of-war camp.
Yang Wen-li travels to his new post on the planet Econia in the Thanatos Starzone. There, he makes acquaintance with Fyodor Patrichev as well as a number of veterans from the Second Battle of Tiamat, including the oldest prisoner-of-war in the Econia Internment Camp, Christopf von Köfenhiller.
A prisoner named Presberg takes several Free Planets Alliance officers hostage: Yang Wen-li is ordered to substitute himself, along with Fyodor Patrichev, for the safe return of the hostages. Another prisoner, Christopf von Köfenhiller, also volunteers to be a hostage.
Prequel to the original series, focusing on Reinhard and his steps up the chain of command in the Galactic Empire. Also focusing on the FPA's Yang Wen-li. A chronicle on how he earned the title "The Hero of El Facile" and his handling of assignments he received after the historic event. Spiral Labyrinth also continues with the background of Reinhard and Kircheis where the first Gaiden left off.