Alan Starr has been commissioned to install the new organ and "voice" it for the Church of the Commonwealth in Boston's Back Bay after a fire. He finds a baby on the church steps and discovers the door has been left open in the apartment building next door. He discovers blood on the floor and finds evidence that the apartment belongs to an organist who studied under the same organist he did. He is determined to find her and calls in Homer Kelly for help. Circumstantial evidence suggests she is dead, but things aren't adding up. Langton has written a cozy mystery that is a cut above most others. Her characters are well-developed. I learned much about organs and the categories of pipes in this work. I loved the Back Bay setting as it is an area of Boston with which I'm very familiar. This is a cozy mystery with a lot of layers. There is so much more to the story than the main plot line. Highly recommended. ( )