Born into a world seething with treachery and suspicion, Eleanor Goodricke grows up on the Somerset Levels just after the English Civil Wars, heiress to her late mother's estates and daughter of a Puritan soldier who fears for his brilliant daughter with her dangerous passion for natural history - and for butterflies in particular.

Her reckless courage will take her to places where no woman of her day ever dared to go. Her fearless ambition will give her a place in history for all time. But it is her passionate heart which will lead her into a consuming love - and mortal peril.