It’s always very exciting when a popular television series is able to spin off into a feature film that tells an even bigger story. These movies are so often beautiful odes to what makes the original series so important in the first place. Demon Slayer: Kimetsu no Yaiba is one of the biggest anime hits of the past few years. It tells a fairly traditional story about a boy, Tanjiro, who suffers tragedy only to channel it into his journey to become an acclaimed Demon Slayer, but it’s full of incredible action sequences, lovable characters, and remarkable animation. The first season of Demon Slayer tells a strong story, but in many ways it feels like Tanjiro’s adventure is just getting started. The episodes go out on a cliffhanger of sorts that puts an intimidating–and possibly demonic–locomotive front and center.

The story in Mugen Train picks up from the end of Demon Slayer‘s first season, which involved Tanjiro and company boarding the Infinity Train, unaware that a dangerous demon is also aboard the vehicle. Tanjiro aligns himself with the Flame Hashira, Kyojuro Rengoku. The group hopes to gain valuable intel from Rengoku, but they’re instead roped into a more dangerous scenario. The reckless monster aboard the train that Rengoku focuses on is Enmu, one of the members of the Twelve Demon Moon, who is determined to prove himself to Muzan Kibutsuji through the execution of Tanjiro. All of these powerful personalities come together and clash while also being confined to the claustrophobic quarters of a locomotive. It’s one of Demon Slayer: Kimetsu no Yaiba’s most thrilling story arcs.