In the Spring of 1897 a passenger train set on the Liverpool-London line derailed in a terrible accident, the front four cars falling into the Thames to be washed away without a trace…
In the Winter of 1921 Prof. Julius Smith gatherers some acquaintances to assist him with an odd problem. Smith had been corresponding with an Albert Alexis on the subject of mysterious disappearances. Albert believes his own father, Randolph had vanished, years ago, rather than being killed in the 1897 train wreck. Now Albert himself has gone missing.
Investigators go on the trail of an elaborate train set assembled by Albert, which has ended up in the hands of a Turkish merchant, Mahmet Makryat. This train set is somehow linked to the 1897 disaster which did not destroy the train, but sent it adrift in time and space as the result of a botched ritual performed by Randolph Alexis, a murderous sorcerer. Albert had used the train set as part of his own ritual to reach his father, but succeeded only long enough to be taken aboard himself.
The train set is recovered from Makryat, and Albert’s notes are used to summon the lost train back into normal reality, at the risk of the wrath of the The Hounds of Tindalos which haunt the strange angles outside our dimensions. The surviving passengers are rescued, Randolph is killed, all before the train vanishes again.