Sinceancienttimes,rumorshaveaboundedofman-eatingdemonslurkinginthewoods.Becauseofthis,thelocaltownsfolkneverventureoutsideatnight.Legendhasitthatademonslayeralsoroamsthenight,huntingdownthesebloodthirstydemons.ForyoungTanjirou,theserumorswillsoontobecomehisharshreality.Eversincethedeathofhisfather,Tanjirouhastakenituponhimselftosupporthisfamily.Althoughtheirlivesmaybehardenedbytragedy,they'vefoundhappiness.ButthatephemeralwarmthisshatteredonedaywhenTanjiroufindshisfamilyslaughteredandthelonesurvivor,hissisterNezuko,turnedintoademon.Tohissurprise,however,Nezukostillshowssignsofhumanemotionandthought.ThusbeginsTanjirou'sjourneytoseekoutthedemonwhokilledtheirfamilyandturnhissisterhumanagain.