Hyacinth Robinson learns that his mother, Florentine Vivier, is imprisoned for the murder of her lover, Lord Frederick Purvis. Raised by his guardian Amanda Pynsent in poverty, Hyacinth grows up learning bookbinding to support himself. He becomes increasingly aware of social inequality and begins to question his identity and place in society. Through his encounters with revolutionaries Eustache Poupin and Paul Muniment, Hyacinth is introduced to socialist ideals and becomes interested in revolutionary activity. While he reconnects with his childhood friend, Millicent Henning, their bond weakens as he becomes more deeply involved in revolutionary circles. The revolutionary meetings expand his worldview but also bring moral dilemmas. Discovering the truth about his mother’s crime and his father’s status deepens his inner turmoil. He pledges loyalty to revolutionary leader Dietrich Hoffendahl, stepping into dangerous new territory. Hyacinth’s life is irrevocably altered as he stands at the crossroads of monumental choices.
