In the outbuilding of a terraced house in Clementhorpe, York, the body of pigeon-fancier Peter Morris lies waiting to be discovered. In the grey light of dawn a large grey fluffy cat enters the yard - just because the gate has been left open. The cat is called Theodore. 

Theodore looks at the dead body with the same interest he would a dead moth. Murder, he thinks, and goes to alert his owner Emily. Within the hour Theodore is accused by the newly-widowed Wendy of eating one of Peter’s pigeons. He resolves to clear his name and unmask the Clementhorpe...