Who murdered Lady Pentreath? The year is 1781, and the war with the American colonies rages across the sea. In Truro, England Branek Pentreath, a local squire, has suffered for years in a miserable marriage. Now his wife has been poisoned with arsenic. Is this unhappy husband responsible? Or was it out of revenge? Branek owns the apothecary shop where Jenna Rosedew, two years a widow, delights in serving her clients. Branek might sell her building to absolve his debts caused by the war—and put her out on the street. Jenna prepared the tinctures for Lady Pentreath, which were later found to contain arsenic. The town's corrupt constable has a grudge against Branek and Jenna. He threatens to send them both to the gallows. Can this feisty widow and brooding squire come together, believe in each other's innocence— fight the attraction that grows between them—as they struggle to solve the crime before it's too late?