Southbury PI Harry Banner is working for the notorious northern gangster Flat Cap Coleman. The ruthless Flat Cap is in town to find out why a pocket watch that belonged to his late brother, Stan, has turned up in a local pawn shop. Stan was shot by a firing squad at Ypres during the war and Flat Cap wants to find out why he was executed...and who gave the order. Harry's got his work cut out to get to the truth, especially as the local mob are taking more than a keen interest in where the investigation might be leading. In fact, wherever Harry goes, trouble seems to follow. What starts out as a tenuous trail leads to a world of closed military ranks and unpunished war crimes. Can there be justice?