All 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 appearances, Inez is thrilled. But someone is stalking Theia; her pet bird is found slain, and her signature gown is destroyed. Soon, Inez realizes that a murderer is within the city's opera halls, and—making her 7th outing (after A Dying Note)—she joins detective Wolter Roeland de Bruijn to thwart this menace before Theia's celebrated voice is silenced.