

Tanjiro’s journey leads him to the Swordsmith Village, where he reunites with two Hashira, members of the Demon Slayer Corps’ highest-ranking swordsmen - Mist Hashira Muichiro Tokito and Love Hashira Mitsuri Kanroji. With the shadows of demons lurking near, a new battle begins for Tanjiro and his comrades. Notes: • The first episode has a runtime of ~49 minutes. • The final episode has a runtime of ~52 minutes.
An Upper Rank Demon has been defeated for the first time in a hundred years by Uzui, Tanjiro, and his comrades' effort. This news causes a ripple effect not only among the members of the Demon Slayer Corps, but also the Upper Rank Demons, who have been summoned by Muzan Kibutsuji. Meanwhile, Tanjiro is recovering at the Butterfly Mansion when he discovers that he has upset his swordsmith Haganezuka after chipping his sword and decides to head to the village where the swordsmiths live to talk to him in person. (Source: Crunchyroll)
Tanjiro encounters Mist Hashira Muichiro Tokito and Kotetsu, a boy from the village, arguing. Muichiro is demanding that a "certain key" be handed over to him from Kotetsu. Being unable to look on in silence, Tanjiro intervenes to speak on behalf of Kotetsu, however, Muichiro refuses to listen. According to Kotetsu, the key is used to operate a battle-type Mechanical Doll, Yoriichi Type Zero, that mimics the movement of a certain real-life swordsman... (Source: Crunchyroll)
Yoriichi Type Zero is destroyed at the end of Tanjiro's training, but a sword from over 300 years ago appears from inside. Kotetsu gives Tanjiro the sword, however, it is badly rusted. At that moment, Haganezuka appears and takes the sword with him to perform a grueling whetting process handed down within his family line. Meanwhile, the presence of demons is inching closer to the village... (Source: Crunchyroll)
Muichiro rescues Kotetsu who was being attacked by a goldfish demon. He tries to rush to the village where crisis is looming, however, is asked by Kotetsu to rescue Haganezuka and Kanamori, so he begins heading their way instead. Meanwhile, Tanjiro, Nezuko, and Genya are facing off against the demons who have split into four separate bodies. Separated from the rest, Tanjiro alone continues to fight a close battle with the demon with a mark of the word "Joy"... (Source: Crunchyroll)
Upon arriving at the village, Mitsuri rushes to the chief of the village, Tecchin, and finds that all of his guards have been defeated and he himself is in a life-or-death situation. Muichiro is being guided by Kanamori, whom he rescued along the way, to the studio to receive his sword. However, Upper Five Gyokko is waiting in front of the studio, where Haganezuka is also working... (Source: Crunchyroll)
After beheading three clones, Tanjiro stumbles upon Genya who has beheaded Aizetsu but has now changed in appearance. Genya recalls his past.
Genya entrusts Tanjiro with the task of beheading Hantengu. Tanjiro swings his sword at the fleeing demon but an unknown demonic entity emerges behind him.
Muichiro, with the help of air blown by Kotetsu to him, escapes Gyokko's Water Prison Pot. Muichiro finally recalls his tragic past.
Muichiro faces off against Gyokko once again with a new Nichirin sword he received from Kanamori.
As the battle with Zohakuten intensifies, Mitsuri also develops a demon slayer mark on her neck. Just like Mucihiro, the power she gains as a result is tremendous, and she's able to overpower Zohakuten for a while.