Tanjiro and his friends are able to heal their battle wounds through the help of one of the Pillars, Shinobu, and learn to concentrate and maintain full concentration. Then, with new orders, the group boards the "Mugen Train" and, along with the Flame Pillar of Purgatory, exterminate the demons lurking on the train! However, this happens in a dream created by the demon, and Tanjiro and his friends are stuck in the dream. Is there a way out of this predicament?
