Set against the backdrop of WW1, Mayfair 100 is the telephone number for a small, specially-formed crime fighting team based in a house in Mayfair.
A call comes through to Mayfair 100, where the intrepid team of investigators eagerly await their next case. A society gossip queen has been found hanged in her room in mysterious circumstances. Her enemies are numerous – and her family are convinced she was murdered.
Can the group uncover the truth?