"The Mage's Secret" (魔法使いの隠し事, Mahōtsukai no Kakushigoto)
"Killing Magic" (人を殺す魔法, Hito o Korosu Mahō)
"New Year's Festival" (新年祭, Shinnen-sai)
"The Land Where Souls Rest" (魂の眠る地, Tamashii no Nemuru Chi)
After a 10-year long journey to defeat the Demon King and bring peace to the world, the elven mage Frieren parts ways with her companions, the hero Himmel, the dwarf warrior Eisen and the priest Heiter. 50 years later, Frieren reunites briefly with them before Himmel passes away from old age. During his funeral, Frieren realizes that she misses him and wanted to know him better. Some years later, Frieren pays a visit to an elderly Heiter and takes his adopted daughter, a war orphan called Fern as her apprentice. A few years after Heiter's death, Frieren learns from a grimoire left by her late teacher, the Great Sage Flamme about the resting place of souls, located inside the Demon King's castle, and begins a new journey with Fern intending to see Himmel again to bid the hero a fitting farewell and express her feelings.
"The Northern Checkpoint" (北方の関所, Hoppō no Sekisho)
"Liberation Festival" (解放祭, Kaihō-sai)
"Monsters That Speak" (言葉を話す魔物, Kotoba o Hanasu Mamono)
"Draht" (ドラート, Dorāto)
"The Murder of a Guard" (衛兵殺し, Eihei Goroshi)
"Frieren the Slayer" (葬送のフリーレン, Sōsō no Furīren)
Eisen refuses to join Frieren's new adventure, intending to spend his elderly days in peace but by his suggestion, she recruits his adopted son, a young warrior called Stark. The party then sets north to the Northern Plateau up to a city where the local lord, Graf Ganat, negotiates an armistice with some remnants of the Demon Lord's army, led by Lügner, a servant of "Aura the Guillotine", an old enemy of Frieren's. Certain that the demons are lying, Frieren attempts to attack Lügner and is arrested. Draht, one of Lügner's assistants, attempts to kill Frieren in her cell, but she kills him instead and escapes.
"The Scales of Obedience" (服従の天秤, Fukujū no Tenbin)
"A Victory and a Funeral" (勝利と弔い, Shōri to Tomurai)
"The Elves' Wish" (エルフの願望, Erufu no Ganbō)
"The Village of the Sword" (剣の里, Tsurugi no Sato)
"A Gift to a Warrior" (戦士への贈り物, Senshi e no Okurimono)
"A Priest from an Ordinary Village" (平凡な村の僧侶, Heibon na Mura no Sōryo)
Lügner reveals his true objective, which is to force Graf Ganat to dispel the magic barrier that protects the city, allowing Aura and her forces to invade. Ganat refuses and is rescued by Fern and Stark, who kill Lügner and his other assistant, Linie. Meanwhile, Frieren confronts Aura directly and defeats her by turning Aura's own submission magic against her, forcing the demon to kill herself. The party then continues their journey, but they discover that to gain entry into the Northern Lands, one of them must be promoted to first rank mage and set for the city of Äußerst to take the certification exam. On their way, they meet the priest Sein, whom Frieren invites to join them.
"The Priest and His Regret" (僧侶と後悔, Sōryo to Kōkai)
"Ideal Adult" (理想の大人, Risō no Otona)
"Mirrored Lotus" (鏡蓮華, Kagami Renge)
"Chaos Flower" (混沌花, Konton Ka)
"The Orden Family" (オルデン家, Oruden-ke)
"Old Man Voll" (フォル爺, Foru-jii)
"Statues of Heroes" (英雄の像, Eiyū no Zō)
"A Reason to Begin the Journey" (旅立ちのきっかけ, Tabidachi no Kikkake)
"Emotional Support" (心の支え, Kokoro no Sasae)
"The First-Class Exam" (一級試験, Ikkyū Shiken)
Despite refusing at first, Sein accepts Frieren's offer and joins the party. The four travel together for a while until Sein obtains some clues about the whereabouts of an old friend of his, forcing Sein to depart alone in order to keep searching for him. Frieren and the others arrive at Äußerst where Frieren and Fern take part in the first rank mage certification exam held by the Northern Continental Magic Association, which is led by Serie, an ancient and powerful elf who is an old acquaintance of Frieren and Flamme's teacher.
"Fern and Her Baked Sweets" (フェルンと焼き菓子, Ferun to Yaki Gashi)
In the first round of the examination, Frieren and Fern are assigned to different groups of three mages. Each group is tasked is to capture a Stille, a rare and cunning species of magical bird and prevent it from being stolen by other teams until the time ends. Both Frieren and Fern's teams capture a bird each and fight other teams to protect them, triumphing in the end.
"The Ruins of the King's Tomb" (零落の王墓, Reiraku no Ōbo)
"Dungeons and Magical Items" (迷宮と魔道具, Danjon to Madōgu)
"Spiegel–A Water-Mirror Demon" (水鏡の悪魔, Shupīgeru)
"Dungeon Battle" (迷宮戦闘, Danjon Sentō)
"Strategy Meeting" (作戦会議, Sakusen Kaigi)
"An Era of Humans" (人間の時代, Ningen no Jidai)
"A Spell That Slashes Almost Anything" (大体なんでも切る魔法, Reiruzaiden)
"The Second Exam Ends" (第二次試験終了, Dainiji Shiken Shūryō)
"Fern's Staff" (フェルンの杖, Ferun no Tsue)
"The Third Exam" (第三次試験, Daisanji Shiken)
In the second round of the examination, the mages who passed the previous round are tasked to conquer a dungeon which was never cleared before. Inside the dungeon, the mages are attacked by clones of themselves created by a demon who resides within the dungeon's deepest part. After a few mages are forced to retreat, the remaining ones including Frieren and Fern join forces to defeat their clones and destroy the demon, clearing the dungeon and passing the exam. Serie decides to hold the third and final round of the exam personally, selecting the candidates whom she deems fit for promotion. Serie rejects several candidates, including Frieren, whom she is at odds with, but is surprised when Fern notices the instability in Serie's mana, not only approving Fern but inviting the girl to be her apprentice, which she declines.
"Erilfrachte—The Spell to Dispel Fog" (霧を晴らす魔法, Erirufurāte)
"Settling" (決着, Ketchaku)
"A Thunder of Dragons" (竜の群れ, Ryū no Mure)
The party reunites with fellow mages Genau and Methode whom they first met in the magic exam. The two are tasked to take down the Demon General Revolte which is terrorizing the region. Frieren and the others agree to help them, with Stark and Genau slaying Revolte together while Frieren and the others kill his subordinates. Meanwhile, Denken, an elderly mage who also passed the exam arrives at his homeland, the city of Weise, with was transmuted into gold by the last and strongest of the Demon King's seven sages, "Macht of El Dorado".
"Diagoldze—The Spell to Transmute All Creation into Gold" (万物を黄金に変える魔法, Dīagoruze)
"The Stone Bracelet of Servitude" (支配の石環, Shihai no Sekikan)
"Daredevil" (命知らず, Inochi Shirazu)
"Malice" (悪意, Akui)
"Discussions" (話し合い, Hanashiai)
"Affection" (好意, Kōi)
By the Magic Association's request, Frieren's party reunite with Denken, who asks for their assistance in taking down Macht and returning Weise to normal. In the occasion, it is revealed that Macht is a demon who voluntarily served Glück, the lord of Weise and Denken's father-in-law until he decided to betray his master and cast a curse called "Diagoldze" that transmuted the entire city into gold before he is confined within the city's premises by a magic barrier erected by the association. Denken also reveals that he was Macht's apprentice and visits him frequently. Denken takes the party to meet Macht for a friendly talk and Frieren, who once fought Macht and was almost killed by the demon, concludes that they can't defeat him in their current condition. However, Denken reveals that one of the association mages tapped into Macht's memories and asks for Frieren's help in analyzing them in order to look for a way to counter Diagoldze and defeat him.
"Nameless Great Demon" (無名の大魔族, Mumei no Daimazoku)
"Master and Apprentice" (師弟, Shitei)
"Observation" (観測, Kansoku)
Frieren and Denken learn through Macht's memories that the demon was eager to learn about human emotions, which led him to befriend Glück and become his subordinate, helping Glück to become ruler of Weise by assassinating his political rivals. Many years later, Glück is forced by the other citizens to equip Macht with an artifact to control him, the "Stone Bracelet of Servitude", commanding him to serve the citizens of Weise and never act with malice upon them. However as a demon, Macht has no concept of human malice, allowing him to betray Glück and turn the entire city and its inhabitants into gold despite bound by the bracelet. As Frieren researches a way to dispel Diagoldze, Solitär, another demon and Macht's associate, dispels the barrier, allowing him to escape and spread the effects of Diagoldze, turning Frieren and the others into gold as well, until Frieren finishes her analysis and restores her body.
"The Fundamentals of Mages" (魔法使いの基礎, Mahōtsukai no Kiso)
"Breakthrough" (打開策, Dakaisaku)
"A Tie" (相打ち, Aiuchi)
"Time for Retribution" (報いの時, Mukui no Toki)
"A Visit to Her Grave" (墓参り, Hakamairi)
"Golem" (ゴーレム, Gōremu)
"Sky-Mountain Dragon" (天脈竜, Ten myaku Ryū)
"The Monument of the Goddess" (女神の石碑, Megami no Sekihi)
Frieren restores Denken, who fights Macht, while Frieren confronts Solitär. Overpowered by her opponent, Frieren makes one last desperate move by using the rest of her mana to dispel Diagoldze across all the city, allowing the restored Fern to kill Solitär with a sniping attack and Denken to deal a fatal blow to a surprised Macht. In his last moments, Macht reunites and has a peaceful conversation with a restored Glück. After the battle, Glück learns that his crimes were discovered and that he will eventually face judgement, while Denken fulfills his longtime wish to pay a visit to his late wife's grave. Frieren and the others continue their journey, until they stumble on an ancient monument left behind by the Goddess. Upon examining the monument, Frieren's mind travels several decades to the past all the way to the time she was traveling with Himmel, Heiter and Eisen.
After using a spell she learned in the future to defeat a powerful demon attacking the party, Frieren reveals the truth to the others, who believe her and agree to not inquire her further and keep the situation a secret to prevent a time paradox. With some investigation, the Hero's party discovers a way to send Frieren back to her rightful time, while Solitär and Grausam, one of the seven sages, are informed by the Demon King about Frieren's condition and attack them, intending to obtain her knowledge of the future for their own gains. Grausam uses his magic to trap the party into an idylic illusion where they are holding Himmel and Frieren's wedding.
"Proof of Perseverance" (頑張ってきた証, Ganbatte kita akashi)
"Shadow Warrior" (影なる戦士, Kagenaru senshi)
"Family" (家族, Kazoku)
"A New Mission" (新たな任務, Aratana ninmu)
"Retrieval Mission" (回収任務, Kaishū ninmu)
With Frieren's help, Himmel breaks Grausam's illusion and safely escorts her to the Goddess monument, where she manages to return to the present. The reunited party continues their journey, entering the Empire's territory. While spending the night in a remote village, the party is attacked by Radar, an assassin and member of the "Shadow Warriors" with orders from the Empire to dispose of several mages, including Frieren herself and defeats him, sparing his life. Once arriving in the Imperial Capital Eiseberg, the party is contacted by Falch and Sense, two mages from the Magic Association, who enlist their help to protect Serie while she attends an important event in the city, the "Foundation Festival", after learning that the Empire is also after her life, with assistance of two other mages they met during the exam, Übel and Land.