When Charlotte Smith's wealthy parents commit her beloved sister Phoebe to the infamous Goldengrove Asylum, Charlotte knows there's more to the story than madness. She commits herself to the insane asylum, surrendering her real identity as a privileged young lady of San Francisco society to become a nameless inmate, Woman 99. The longer she stays, the more she realizes that many of the women of Goldengrove Asylum aren't insane, merely inconvenient—and her search for the truth threatens to dig up secrets that some very powerful people would do anything to keep. Inspired by the investigative journalism of Nellie Bly, and other true accounts of 19th century insane asylums.