Tanjiro and friends have completed their rehabilitation training at the Butterfly Mansion, and arrive at their next mission on the Mugen Train, where over 40 people have disappeared over a short period. Tanjiro, Nezuko, Zenitsu and Inosuke join one of the most powerful swordsmen in the Demon Slayer Corps, Flame Hashira Kyojuro Rengoku, to face the demon aboard the Mugen Train on track to despair.
