Man in Ambush

Chief Inspector Martineau and Sergeant Devery have every motive for finding and pursuing a killer who murdered their friend and colleague Inspector Robert McQuade, especially as it now appears that the same person may have Martineau in his sights. But what does all this have to do with a crooked stockbroker and a man who is trying to frame the Chief Inspector for taking bribes? And could the investigation be putting his family in jeopardy?