Bath, England. 1890. Mystery author Lady Amy Lovell receives an anonymous letter with shocking news: her fiance has been dabbling in something illegal. She breaks the engagement, but two evenings later her former fiance makes an unexpected appearance at her house. She sends him to the library to cool his heels but later discovers the room seemingly empty - until she stumbles upon his body. Dead, with a knife in his chest. Desperate to clear her name, Lady Amy launches her own investigation. Can she close the book on the case before the real killer gets away with murder?