Demon Slayer Story Summary

Origin of Demons

• A thousand years ago: A frail boy is born, nearly dies but is revived during cremation.
• Unknown illness: Boy's life expectancy is 20 years.
• Blue lily medicine: Given by doctor, turning him into a demon craving human flesh but weak to sunlight.
• First demon: Boy becomes Muzan Kibutsuji, demon king.
• Uyashiki family: Cursed by Muzan, instructed to slay him to save future generations.
• Demon Slayer Corps: Founded to hunt Muzan.
• Muzan's goal: Seeking red lily flower to eradicate sunlight weakness.

Key Characters and Events

• Muzan and Michikatsu Tsugikuni: Michikatsu (moon breathing style) becomes Upper Moon One, known as Kokushibo.
• Yoriichi Tsugikuni: Nearly kills Muzan, possesses godly attributes, connected to Kamado family through Sun Breathing (Hinokami Kagura) and earrings.

Kamado Family Tragedy

• Kamado family: Tanjiro and Nezuko are the eldest siblings.
• Muzan attack: Family slaughtered, Nezuko turned into a demon.
• Giyu Tomioka: Water Hashira, spares Nezuko due to her control and Tanjiro's persistence.
• Training: Tanjiro trains under Sakonji Urokodaki for a year.
• Demon Slayer Exam: Tanjiro passes, joins the corps.

Early Missions

• First mission: Faces a demon using blood demon art.
• Tokyo: First encounter with Muzan, meets Tamayo and Yushiro, learns about demon-to-human antidote.
• Zenitsu Agatsuma: Joins Tanjiro, directed to a mansion with Inosuke Hashibira.
• Lower Moon Six: Defeated with Zenitsu and Inosuke’s help.

Mount Natagumo Arc

• Mount Natagumo: Investigate powerful Lower Moon demon Rui and his family.
• Shifting styles: Tanjiro switches from water to sun breathing, almost kills Rui.
• Hashira intervention: Giyu and Shinobu Kocho arrive, siblings captured, presented to Hashiras.
• Kagaya Ubuyashiki: Head of Demon Slayer Corps, spares siblings.

Infinite Train Arc

• Flame Hashira Rengoku: Joins mission, battles Lower Moon One Enmu.
• Akaza: Upper Moon Three, kills Rengoku, escapes.

Red Light District Arc

• Tengen Uzui: Sound Hashira, investigates missing wives.
• Upper Moon Six: Daki defeated, Gyutaro revealed and slain.

Swordsmith Village Arc

• Swordsmith Village: Tanjiro repairs sword, trains with Yoriichi Type Zero doll.
• Upper Moon Four and Five: Attacked village, defeated with help of Mitsuri Kanroji and Muichiro Tokito.
• Nezuko's immunity: Gains immunity from sun, attracts Muzan's interest.

Final Battle with Muzan

• Hashira training: Demon slayers train to fight Muzan.
• Kagaya's sacrifice: Blows up his house to weaken Muzan.
• Infinity Castle: Final confrontation, Nakime’s defeat.
• Upper Moon Two Doma: Defeated by Shinobu, Kanao, and Inosuke.
• Upper Moon Three Akaza: Defeated by Tanjiro and Giyu.
• Muzan's new form: Poisoned by Tamayo’s drug, fought by Hashiras and Tanjiro.
• Final defeat: Muzan injects Tanjiro, turning him into a demon, but is reverted by Kanao’s medicine.

Conclusion

• Muzan defeated: Demon Slayer Corps disbanded.
• Nezuko human: Returns to human form, lives with Tanjiro, Zenitsu, and Inosuke in Kamado house.