Demon Slayer: Kimetsu no Yaiba Mugen Train Arc

Tanjiro Kamado and his fellow Demon Slayers board the Infinity Train for a new assignment. A string of unexplained disappearances has been linked to the train, where a demon has been preying on passengers and killing members of the Demon Slayer Corps who attempt to stop it.

Tanjiro enters the mission alongside familiar companions including Nezuko, Zenitsu Agatsuma, and Inosuke Hashibira, with Kyoujurou Rengoku also central to the operation. Confined aboard a moving train where the enemy's methods are still uncertain, the group must discover what is happening to the missing passengers and confront the demon responsible. The arc follows their investigation as an apparently straightforward assignment becomes a dangerous supernatural battle involving everyone aboard.