Whisked off to London by her newly revealed half brother, Miss Juliana Applegate is supposed to be looking for an eligible gentleman suitable for marriage. But when she arrives, an illness in her brother's household forces her to stay instead with his friend Lady Sealey—and her handsome grandson, Sir Oliver Ramsey. Sir Oliver has always felt clumsy and awkward around the fairer sex, but despite his gruffness, Juliana senses a gentleness in the man who seems at first more of a fierce Viking than a shy zoologist.

Soon, she has ample opportunity to test her theory about Sir Oliver, as they are thrown together time and again—first by chance, and then to work toward a common goal. Someone is sending Lady Sealey mysterious vengeful letters that threaten an imminent doom. When the attacks begin, Juliana and Oliver are determined to protect her—even at cost to their own hearts and growing passion, as well as their very lives...