Fiona Marlowe, interior designer to the rich and powerful, finds her wealthy old client, Albert Lodge, dead on the floor of his library in the posh McLean suburb of Washington, D.C. As the investigation unfolds, Fiona discovers she has detective talent, and her innate curiosity spurs her into sticking her nose where it does not belong. Albert's eccentric sister, Opal, arrives from her ranch in southeastern Oregon to settle the estate. She has talked her ranch hand, Jake Manyhorses, into the role of private investigator as she is convinced one of the numerous family members murdered Albert for his money. With Opal's encouragement Fiona joins Jake in the investigation as it spirals into the netherworld of betrayal, blackmail, and smuggling, none of which Jake or Fiona bargained for when they agreed to help solve the mystery of Albert's demise.