Chicago, 1898. In the midst of the Progressive Era, twenty-one-year-old junior detective Harriet Morrow is determined to prove she's more than a lucky hire as the Prescott Agency's first woman operative. But her latest challenge--a murder case steeped in scandal--could become a deadly setback . . . As the Windy City thaws from a harsh winter, Harriet Morrow finds herself doubting her investigative skills when she's assigned to solve a high-stakes murder case well above her pay grade. And there's also a catch. Harriet must somehow blend in as an "unremarkable" young woman--one who feels confident in skirts, not men's clothing--on a quest to infiltrate the immigrant community at the center of the grisly crime . . . The mystery has more twists and turns than her morning bike commute, with a muckraker found murdered in a southside tenement building after obtaining evidence of a powerful politician's corruption. While Harriet gains the trust of the tenement's women residents to gather clues, the undercover mission reveals an innocent mother might have been framed for the crime--and exposes ties to another violent death. Harriet will need to survive rising threats to assert her place in a world that's quick to dismiss her--and out a killer who's always one step ahead . . .