Derby Day at Epsom Downs. A multitude of people crowd to watch the races: dukes & dustmen bishops & beggars privileged ladies & prostitutes. The gamut of Victorian society & a hotbed for crime & crooks of all kinds. With the nation a-flutter in the run up to this national event a disembodied head is discovered on a passenger train at Crewe; the first in a murky course of events that takes in murder fraud & race-fixing. Detective Inspector Robert Colbeck & his assistant are assigned to the case & are soon snarled up in a web of skulduggery stretching across the country. They are forced to ask themselves just how much is someone prepared to hazard to win?