A fashionable new sanatorium is attracting London's elite with the promise of curing many ills, but whispers soon emerge of questionable practices. Do they offer miracle treatments . . . or something far more sinister?

Amelia Greystone is alarmed by the rumors as a friend currently resides within the sanatorium's walls. She turns to Scotland Yard Inspector Henry Field, and together they begin to track down patients and scrutinize supposed cures.

Before they can press further, disaster strikes. A bomb detonates at Scotland Yard, and Henry is caught in the blast, leaving Amelia shaken. Seeing Henry injured stirs the grief she's tried to put behind her after the deaths of her husband and daughter. She can't bear the thought of losing another loved one. And she detests that science has been twisted into a weapon against the man who's become so dear to her.

Henry is unaccustomed to being the victim of a crime, and he struggles knowing that his growing affection for Amelia has placed her in danger yet again.

As ominous truths about both the sanatorium and the bombing emerge, Henry and Amelia must rely on each other to expose a sinister deception.

Escape to the dark streets of Victorian London with the sixth novel in the Field & Greystone series—perfect for historical mystery fans of Irina Shapiro, Charles Finch, and Miss Scarlet and the Duke.