Tanjiro, Inosuke, and Zenitsu were rescued by Shinobu and Tomioka after their mission on Mt. Natagumo. While the three swordsmen are taking their sleep, a sudden noise and a blinding light sent them to a mysterious room alongside with the Hashiras and their swordsmiths. What would they react to see Tanjiro's previous life and how he became one of the greatest Demon Slayers in the present.

Before Hikaru, Tanjiro, Nezuko, Zenitsu and Inosuke leave the wisteria house to Mt Natagumo they are brought to a field and told they are going to react to there past and future. They aren't the only ones there either and everyone wants to know, who is the person that brought them here and who is it that they dearly wish to save? Join the Hasira, demon slayers and demons as they see their future, uncover secrets and plan so that they can hopefully stop the death and destruction that is going to happen.