In London in 1888, autumn is coming.
Irene Adler, a once brilliant soprano at the Royal Opera House, now lives in seclusion in a townhouse in Belgravia, helping the nobles resolve various troubles as an "upper-class adviser". Her salon is one of the most mysterious gathering places of London's upper class, and her insight is the most precious weapon in this circle.
However, when news of the death of a young soprano came, Irene's peaceful life was broken.
Cecilia Ashford, the rising opera star known as the "Nightingale", was found dead in her dressing room at the Royal Opera House. The police ruled it a suicide, but journalist Edward Hawke suspected it was a carefully planned murder. As the investigation deepens, Eileen discovers that behind the case there are scandals involving the Devonshire family, the mysterious "Collectors" organization, and a conspiracy that could shake the entire upper class of London.
Both women are accustomed to placing a white rose in their dressing room.
One chose to leave the stage, and the other chose to remain silent forever.
And now, Irene Adler is about to step into the fog to find the truth——
Purpose: Fight against power with wisdom and seek justice for the voiceless.
