 Patrick Cullen, a conductor on the New York City subway, is astonished when no one gets off his train as it reaches Flatbush, the end of the line.He's even more astonished when the train starts moving again and travels on via various non-existent stations.He meets a man who introduces himself as Mr Crumley, who says he's practicing to be a god and forthwith converts Cullen to believe in him.