In the gritty underbelly of 1880s New York City, Una Kelly's skill as a grifter keeps her a breath away from destitution. When falsely accused of murder, she flees and cons her way into the lauded Bellevue Hospital's nursing school, built on Florence Nightingale's principles. Within the austere walls of this institution, survival for a woman of her background means adherence to discipline and intellect, challenging her rough-edged instincts. Yet, she thrives, finding unexpected friendship and earning respect amidst the harsh realities of 19th-century medicine. When a series of alarming deaths grip the hospital, Una faces a critical choice: remain safely hidden behind her false identity or risk everything to uncover a truth that could free her or condemn her.