Detective Inspector Charlie Baker has to figure out who murdered a young flight lieutenant - and why. It might have something to do with the fact that the victim's father is Major General Sir Edward Crowley, an important member of the Imperial General Staff. Charlie turns to the network of London cabbies - among them his uncle - to get the information he so badly needs. Under pressure to solve the case as the war continues to rage, Charlie has to unravel the mystery, even as the General and his family remain under threat. And the fact that he's fairly certain that he's falling in love with the General's daughter isn't making his job any easier!