Former police officer Darby Spencer and her mystery novelist mother Victoria Spencer have opposite personalities but still embark on the unlikeliest of ventures: becoming partners in a private detective agency. They are mistaken as sisters as they tackle puzzling cases in Alder Bluffs.

A man is falsely convicted of the murder of his wife. During his time in jail, he finds comfort from four women with whom he corresponds. After his second court appearance, he is finally freed from prison only to be framed for yet 2 more murders which he did not commit. With the help of his former prison guard, he once again sets out to clear his name