San Francisco. Winter 1881-82.
All pianist Inez Stannert wants for Christmas is for the struggling music store she owns in San Francisco to be a success. When diva Theia Carrington Drake asks Inez to be her accompanist for several high-profile personal appearances, Inez is thrilled. This is the chance she was waiting for — a way to make some extra money and bring her store into the limelight of the city's polite society to enhance her business.
But things are far from pitch perfect. An unknown threat is stalking Theia — her pet bird is found slain, and her signature gown is destroyed. Soon, Inez realizes that a murderer is stalking the city's opera halls, and that it's only a matter of time before Theia is his next victim. She'll have to enlist the help of private investigator Wolter Roeland de Bruijn and uncover the killer before Theia's celebrated voice is silenced — permanently.