A freed slave in 1830s Paris finds himself entangled in a dangerous conspiracy when a former associate is murdered. Benjamin January, a skilled physician and musician, is drawn into the investigation of his friend's death, a man who was involved in revolutionary politics. Benjamin must navigate the treacherous social and political landscape of post-Napoleonic Paris, where racial prejudice and hidden agendas abound. He is aided by his loyal companions, the resourceful Rose and the formidable Monsieur Saint-Germain, as they race against time to uncover the truth before they become the next victims.

The Benjamin January series is known for its intricate historical settings and compelling protagonist. 'The Shirt on His Back' continues this tradition, offering a rich portrayal of 1830s Paris and the challenges faced by its Black characters. Readers often praise Hambly's ability to weave complex mysteries into vivid historical backdrops, making the series a favorite among fans of historical fiction and mystery alike. The novel is expected to deliver a satisfying blend of suspense and historical detail.