Allen and his friends return to the Frontier, but Allen barely gets to enjoy a week of peace before another visitor comes to request his help! It’s Akira, the Champion, with a strange Amazon in tow. Naturally, it isn’t long before Allen is wrapped up in trouble again, as Chloe— the Amazon—reveals that the people of her and Mylène’s village are still alive, and Akira leads the entire party to a mysterious abandoned demon lair deep within the desert on Adastera’s southern border. As the party searches for clues as to the surviving Amazons’ whereabouts, it couldn’t be more obvious that something is seriously amiss.

Meanwhile, Riese and Noel are summoned to the capital, where they find themselves mixed up with a shadowy, border-spanning organization. And this time, Allen might have to do the unthinkable to finally obtain the peace he seeks...