The adventure has ended, but life goes on for an elf mage who is just beginning to understand what it means to live. The elf mage Frieren and her brave companions have defeated the Demon King and brought peace to the land. However, Frieren will live much longer than the rest of her group. How will she be able to understand what life means to the people around her?

With Eisen's encouragement, Frieren and her apprentice Fern head north in search of the land where the souls of heroes are said to rest, which is also the location of the Demon King's castle. Along the way, they encounter Eisen's student, whose combat skills may prove useful—despite the Demon King being gone, his surviving servants still have unfinished business with Frieren!