Fourteen warriors set out to prevent an invasion, but only seven return. Three died along the way, and four were slain for betraying the empire. In truth, it is the Seven Heroes who turned on their allies so they could take all the glory. Ascheriit was their victim, but now, 20 years later, he is back to get revenge.
Cast: Yuya Hirose, Hina Tachibana, Toshiki Masuda, Hitomi Ueda, Yui Kanari, Kenichirou Matsuda, Kohsuke Toriumi, Ryota Suzuki, Kazuhiko Inoue, Taiten Kusunoki, Naoya Uchida
Ichfeis, a slave knight who seeks to earn his freedom, faces Köinzell the Hero-Killer in a fated duel. As they cross blades, Ichfeis coaxes Köinzell to launch the Black Wing, the crowning technique of Ludift-style swordsmanship, and delivers his own imperfect rendition. Köinzell strikes back with a magnificent assault.
Köinzell's stand against the batterygrave's military inspires the townsfolks of Jullas-Abllas to take up arms. Their bravery even convinces Elsaria, the Elector's daughter, to side with the Free City.
At the Hall of Swords, Glenn entrusts a manhunt mission to Ichfeis, a slave knight vying to restore the title Blatt Meister. Meanwhile, in the Free City Jullas-Abllas, Köinzell's fight against Elsaria and company takes a desperate turn.
In a fit of paranoia, the deranged Batterygrave Barestar commands his men to search for the Hero-Killer in the Free City Jullas-Abllas, where Köinzell sought shelter. Meanwhile, under Glenn's leadership, Elsaria's company hunts for the treacherous rebel.
A state funeral is held to pay tribute to Schtemwölech's glorious rule. Peepi and Altea reconvene with Köinzell, who had taken shelter in the mountains. As the company watch the funeral procession lay the landgrave's coffin to rest at the sacred burial site, Köinzell vows vengeance against the six remaining heroes.
Köinzell must confront his former friend to put an end to his twisted plan.
Schtemwölech welcomes Köinzell's assault with a powerful blast from Dragon's Maw, a Wischtechian magic artillery. Geranpen is faced with the ultimate choice: either remain loyal to his Lord or seek out the truth.
Chiliarch Fargo launches a brutal assault on the refugees, including Peepi. Under the moonlit sky, Köinzell unleashes the power of his Black Sword.
When Köinzell reaches the Seven Heroes' encampment, he is forced to confront the immense power and glory his former comrades have amassed since they murdered him in cold blood. Despondent, Köinzell is standing in the rain when a masked avenger makes an attempt on his life.
During a deadly exchange against Rangzatz, Köinzell is thrust down to the depths of the underground monastery. However, Köinzell had visited this fortress with Ergnach in the past. And now, as Köinzell fends off the elite warrior monks, he releases the magic circle spell his comrade had once sacrificed his life to conjure.
Blatt Meister Ascheriit was slain by his allies and was branded a traitor. Now, 20 years later, he is back with a new name, Köinzell, and a thirst for vengeance. Köinzell arrives at the border wall, Thousand Stonespears, at the Border City of Rielde-Velem. Here, he sets about infiltrating an underground monastery of corrupt monks.