Stylish lady detective Miss Isabel Hewitt's manservant Clarke is away in Flanders serving in the Royal Medical Core. Isabel is anxious for his safety. On the Home Front she has become involved with the Women's Emergency Corps. Through this work she has met a tall, well built young woman named Hattie Peach. Hattie is now her maid and driver. Isabel is coping with her new life and then someone murders two girls from the WEC. These take place in Shoreditch and there are fears that Jack the Ripper may be back. Isabel is asked to investigate and she embarks on a journey which becomes both emotional and very dangerous indeed.