Maggie Price, interior plant decorator and owner of Plants Alive! Interior Landscaping, discovers the body of her Aunt Della sprawled out on the front lawn of her rural Tennessee home. The ensuing murder investigation implicates her son, Brian. Convinced of his innocence and determined to find the real killer, Maggie and her brother Joshua Clark race to solve the case themselves. Joshua tells Maggie their aunt had alluded to the possibility of an oil and gas lease on her property, but how could that figure into a murder? Clues point the finger at an unsavory vagrant, Carl Owens, who had once worked for Della; however, Maggie's relief is short-lived when they realize he has an alibi. Maggie's search soon has her researching the town's criminal past, where stories of unsolved bank robberies and corporate corruption reveal that murder and secrets go hand in hand.