London, 1915. As World War I engulfs Europe, a special task force is formed in the affluent Mayfair district to tackle the city's thorniest crimes against women. When the bobbies and Scotland Yard come up short, there's only one telephone number to dial: Mayfair 100.

An aristocrat has been murdered, and his wife, a witness and possible suspect, will only talk to a woman. With the blessing of London's Chief Commissioner, Chief Inspector Beech, a young man invalided out of the war, assembles a crew of sharp, intrepid, and well-educated women to investigate. But to get at the truth, Beech, Victoria, Caroline, Rigsby, and Tollman will venture into the the city's seedy underbelly, a world where murder is only the first in a litany of evils.

Lynn Brittney's Mayfair 100 series debut, Murder in Belgravia, is the darkly compelling story of a movement far ahead of its time, in an attempt to combat the prejudices against women then and now.