The Demon Slayer Corps - An organization that's been hunting down demons since ancient times. Sakonji Urokodaki starts training Tanjiro for Final Selection, the test for joining the unit.
Two demons, Tamayo and Yushiro come to Tanjiro's rescue. Tamayo guides Tanjiro and Nezuko to her house where Tanjiro learns how to return demons to humans.
Two demons, Tamayo and Yushiro come to Tanjiro's rescue. Tamayo guides Tanjiro and Nezuko to her house where Tanjiro learns how to return demons to humans.
After defeating Kyogai, Tanjiro steps outside where he spots Inosuke who is eager to fight him. After a short tussle Tanjiro, Inosuke , Nezuko and Zenitsu head to a manor where they are taken in by an old woman.
Tanjiro heads to his next location to a mountain northwest and he brings Inosuke and Zenitsu with him. Upon arriving on the spiderweb swarmed mountain Tanjiro and Inosuke soon run into Demon Slayers entangled in spider webs.
Tanjiro and Inosuke head farther up the mountain while battling Demon Slayers trapped by spider webs. Soon they find out that the Spider Demon family is behind it all.
Zenitsu finds himself alone in the woods where he encounters a spider with a human face. Despite being terrified he does his best and manages to defeat the spider human using a new technique.
Inosuke confronts his savior. Zenitsu lies still near his death. Tanjiro faces what seems to be an unstoppable enemy, and in a moment of desperation, recalls his past.
Ubuyashiki, the head of the Demon Slayer Corps, finally appears before Tanjiro. While revealing that he'd like to allow Tanjiro and Nezuko to join the Corps, the Hashira are unable to accept this decision right away.
The injured Tanjiro, Zenitsu, and Inosuke are sent to the home of the Insect Hashira, Shinobu Kocho, for treatment. Two weeks later, Tanjiro and Inosuke start rehabilitation training.
Tanjiro, who has been going through rehabilitation training at the Butterfly Mansion, works hard to keep up his Total Concentration Breathing all day long.
As Tanjiro and the others are devoted to their rehabilitation training, the absolute master of the demons, Muzan Kibutsuji, gathers the lower ranks of the Twelve Kizuki.