<p>1857. Joel Heygate is the popular stationmaster at Exeter St David's railway station. So when the charred remains of a body are discovered in the embers of the town's annual Bonfire Night celebration, everyone is horrified to discover that they belong to Mr Heygate.<br><br>Inspector Robert Colbeck and his assistant Victor Leeming are dispatched to Exeter with all due haste, and quickly unearth a number of suspects. But as Colbeck clo...