Mark Taper is no stranger to the strange, but when a supposedly legendary locomotive (the Ash Sky Rail) appears in records he's never seen before, the city's most brilliant investigator smells a trap. Despite his encyclopedic knowledge of S.I.Haven, this "e;miraculous"e; train is a ghost in the machine, and inconsistent stories from those around him suggest a conspiracy of mass misinformation.When Mark, Glim, and the world-famous rock star 27 Cheshire are suddenly "e;teleported"e; from a quiet bar onto the moving train, they find themselves trapped in a luxury banquet celebrating the Mayor's birthday...an event that, by all electronic accounts, shouldn't be happening for another week.As they navigate the shifting, improbable reality of the "e;Train World"e;, they are hunted by the brutal Chief Rush Skylar and a host of bizarre, fictionalized adversaries born from the train's own narrative. To stop the locomotive before its volatile engines reach a breaking point, Mark must team up with an unlikely ally... the world's most proficient serial killer, Doremi.