Charles Moray goes abroad for several years after being jilted by his fiancee, Margaret Langton. Going to inspect his old house, he hears noises upstairs and stumbles upon a criminal gang. As he spies on them, he overhears them speaking of Margot Standing. She is an heiress, whose fortune they hope to steal and they speak of killing her. His immediate thought is to contact the police, when he recognises Margaret as one of the people in the room. Thrown into the mystery, unable to go to the police for fear of Margaret's involvement, he turns to Miss Maud Silver. Miss Silver seems to spend most of her time knitting, yet she is at every scene and knows exactly what is going on - she reminded me of one of Lord Peter Wimsey's old biddies, only she is most certainly in charge herself. I love golden age mysteries and this had everything - lost and found heiresses, people disappearing, masked criminals, London foggy streets, snippets of letters and intrigue at every turn. Margot is a delightful child, making it harder for people to look after her by blabbing every secret possible to everyone she comes across and the whole book is very tongue in cheek, but utterly enjoyable to read. I will certainly read more by this author and I am glad I have found this series. This is the first book in the series and I read the kindle version of this book, which was error free and well edited.