Season 4

水門都市プリステラの死闘で辛くも勝利を収めたスバルたちだったが、その代償はあまりに大きかった。“暴食“の権能によって眠り続けるレム、記憶を奪われたクルシュ、そして名前を奪われてしまったユリウス。 彼らを救う手がかりを求める中、スバルは全てを見通し、あらゆる知識を持つと言われる『賢者』シャウラの存在を知る。 次の目的地は賢者の住まう「プレアデス監視塔」──そこは、最強の『剣聖』ラインハルトですら攻略できなかった大砂漠「アウグリア砂丘」にそびえ立つ最果ての塔。 猛威を振るう自然、未知なる魔獣、そして想像を絶する脅威が立ちはだかる。仲間と共に、すべてを取り戻すため、命を懸けた少年の旅路が始まる──

In the deadly battle at the Watergate City of Priestella, Subaru and his allies barely emerged victorious—but their triumph came at a great cost. Through the "Authority of Gluttony," Rem was put into suspended animation, while Crusch's memories and even Julius’s name were devoured. As he searches for a way to save them, Subaru learns of the "wise man" Shaula—an all-seeing being said to possess every form of knowledge. His next destination is the Pleiades Watchtower, home to a wise man, the farthest tower standing in the vast, uncharted desert known as the Auguria Dunes—a place so perilous that even the mightiest "Sword Saint," Reinhard, failed to conquer it. The fury of nature, unknown magical beasts, and unimaginable dangers lie ahead. Together with his friends, Subaru embarks on a life-risking journey to reclaim what was lost.