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.
Começa a Seleção Final. Tanjiro e os outros candidatos devem sobreviver durante sete dias em meio aos demônios capturados pelos espadachins do Esquadrão.
Tanjiro é um dos quatro sobreviventes da Seleção Final. Depois de adquirir uma nova espada, ele recebe ordens para cumprir a primeira missão como Caçador de Demônios.
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.
Na companhia de Inosuke e Zenitsu, Tanjiro vai para o norte-nordeste para mais uma missão. Eles chegam ao Monte Natagumo, que está tomado por teias de aranha.
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.