Shrewsbury, 1866. Julian Lockyer is an imposing gentleman in his late fifties. Having reserved a room for the night at the Station Hotel, he asks to be called early in the morning because he has a train to catch. Repeated attempts are made to wake him but there is no response. After forcing the door, the horrified hotel staff discover the bloodied corpse but with the knife still in his hand ... could he have killed himself in such a brutal manner?

The Railway Detective is summoned by his boss Tallis to journey to Shrewsbury and investigate. If it is a simple case of suicide, Colbeck believes that he may be back home that same evening and no need to trouble his sergeant. But when he reaches Shrewsbury, one mystery is solved. The stationmaster tells Colbeck that the dead man is a director of the Great Western Railway company and he was due to takeover as Chairman. Colbeck wonders if this was a case of murder rather than suicide...