Shade keeps putting off studying for his official P.I. exam and dumps a boring adultery case for what sounds exciting: finding Diamond Heist. He and Angie have mixed feelings to learn it's a champion race horse, owned by mega-rich Jim and Bridget Cutler, who offer a fortune to find him before the impending great race. Shade is startled to learn that the first reliable expert he seems to meet is a schemer, and Angie's despised ever-absent mother Nora. They spot irregularities, check out the stable team including the vet and the owners as well as tycoon rival Ivan Zickel, working on various motive theories.
—KGF Vissers