As Ciel and Sebastian boards a train, they see a crate being carried onto the train. It is revealed that inside the crate is an extremely valuable mummy in a sarcophagus. The two are sent on a case involving kidnapping for ransom. After the two meet a group of strange passengers, a policeman resembling Fred Aberline causes mass hysteria when he reveals there is a murderer held by police on the train. He later reveals himself as Aberline's twin brother in the dining car, but Ciel has no recollection of him. Afterwards, Ciel encounters the porter from the station who carried the crate onto the train, recognizing him by the scratches on his hand, and concludes that he is the kidnapper. The porter flees to caboose lounge car, disconnects the cable, and demands the money from a nobleman, whose son is held hostage. Sebastian stops this from happening, but is soon distraught when the kidnapper explains that he implanted a bomb inside the train that will detonate once the train stops, urging him to pursue the train. Meanwhile, Ciel finds the kidnapped boy in the sarcophagus, but is taken hostage by an aforementioned murderer who demands the train be stopped. However, not only is it revealed to all that the train cannot be stopped due to the bomb, but the train is headed for a broken bridge, and there may be an outbreak of cholera. Many of the strange passengers rise to aid the situation, but Sebastian denies their offer and insists on taking care of everything himself. He amends the crisis by getting rid of the murderer, tearing off the dining car roof containing the explosives, and halting the train just before it reaches the broken bridge. Claude, who had been in the dining car the entire time, confronts Sebastian, presenting him with an invitation to a costume ball at the Trancy estate and claiming it would resolve Ciel's revenge.