Tanjiro, now a registered Demon Slayer, teams up with fellow slayers Zenitsu and Inosuke to investigate missing person cases on the mountain Natagumo. After the group is split up during a battle with possessed swordfighters, they slowly begin to realize the entire mountain is being controlled by a clan of Demon spider creatures. A recap of Kimetsu no Yaiba episodes 15–21, with new footage and special end credits.
as Tanjiro Kamado (voice)
as Nezuko Kamado (voice)
as Zenitsu Agatsuma (voice)
as Inosuke Hashibira (voice)
as Rui (voice)
as Shinobu Kocho (voice)
as Giyu Tomioka (voice)
as Kanao Tsuyuri (voice)
as Spider demon (Mother) (voice)
as Spider demon (Brother) (voice)
as Spider demon (Father) (voice)
as Spider demon (Elder sister) (voice)
as Murata (voice)
