The episode unfolds an emotionally charged confrontation between the past and present of the Astrea family. At its core is Wilhelm's battle against the undead-resurrected Theresia, his deceased wife and former "Sword Saint." Despite her manipulated form, Wilhelm recognizes the woman he once loved in her, torn between the desperate attempt to save her and the duty to defeat her. Flashbacks reveal Theresia's fate: as an unwilling bearer of the title "Sword Saint," she lost her brothers in the war and only found a reason for happiness through Wilhelm, who taught her swordsmanship. Her unspoken feelings—symbolized by Wilhelm's never-uttered "I love you"—become a burden when Theresia falls years later in battle against the "White Whale."

Reinhard, the current Sword Saint, ends the conflict by destroying the undead Theresia as a mere "fake." Wilhelm reluctantly accepts this, but their son Heinkel collapses under the accusations. He blames Reinhard for murdering Theresia and stealing her title, while Wilhelm emotionally distances himself and moves on alone. The family's failed communication culminates in Heinkel's hysterical accusations ("Murderer!") and Wilhelm's silence, underscoring the insurmountable rift between generations.

Theresia's final memories—of her love for Wilhelm and her regret at never hearing his words—sharply contrast with Reinhard's cold rationality ("The dead have no future"). Her legacy, "I was blessed to have loved you," leaves a bittersweet trace, while the family lies in ruins: Wilhelm fights on, Heinkel remains consumed by hatred, and Reinhard's role as the "perfect" successor remains questionable.