England, 1764. Thea Morrell has everything society deems success: wealth, status, a husband and a title. But her marriage is far from what it seems.
Her only solace is found in the hushed halls of anatomy lectures, where questions of life and knowledge sustain her dangerous curiosity. Five years have passed since Martha, her lover and confidante, sailed away. Letters once filled with longing have fallen silent, leaving Thea to wonder if distance or disappointment has severed their bond. She is, after all, failing at cultivating any plant of note, and her arch rival Neville Knatchbull looks set to beat her to every goal.
When Frankie, an unruly gardener with secrets of her own, enters her orbit, Thea must decide: will she remain a prisoner of convention, or dare to cultivate a life of her own?