After the legendary elf mage Frieren is forced to confront the cruel passage of time, she sets out on a journey to fulfill the final wishes of her friends and get to know the world a little better. Frieren: Beyond Journey's End ~Prelude~ is a collection of five original short stories supervised by original manga creator Kanehito Yamada and written by Mei Hachimoku. The stories take place within the world of the main series, offering new adventures featuring characters from across the narrative.

The central figure remains Frieren, an elven mage who once traveled with the hero Himmel’s party to defeat the Demon King. Due to her race’s nearly immortal lifespan, she perceives decades as fleeting moments, a disconnect that becomes painfully clear after Himmel dies of old age. Now journeying north toward the resting place of souls to reconnect with her past, she is accompanied by her human apprentice Fern, a disciplined young mage she took under her wing at the request of the late priest Heiter. Their party also includes Stark, a timid but powerful young warrior trained by the dwarven warrior Eisen. The light novel expands its focus to include Lawine and Kanne, two mages who appear during the first-class mage examination arc, as well as the demon Aura the Guillotine, one of the Seven Sages of Destruction whom Frieren eventually confronts.

The stories are set against the backdrop of a world recovering from a devastating war with demons. Magic is a central element of daily life and combat, with mages constantly seeking rare spells known as grimoires. The geography spans from the peaceful Central Lands to the treacherous Northern Plateau, a region where first-class mage certification is required to travel safely. This world is defined by its long history, where elves like Frieren carry memories of events that humans have long forgotten, and where the legacy of the Hero Party continues to shape the lives of ordinary people.

While the original manga follows Frieren's decades-long quest to understand human emotion and reach the mythical region of Aureole, this light novel explores side stories that complement the main plot. Specific arcs are not detailed in available information, but the collection promises to deliver all-new adventures that delve into moments before or during the established timeline. These stories are designed to offer deeper insight into the characters' relationships and backgrounds, all under the direct supervision of the original creator to ensure consistency with the tone and lore of the series.