Many astonishing and affecting things happen at the racetrack, and the mysterious universe of horse racing, passionate, cold-hearted, pure, corrupt, is woven into a marvelous tapestry of joy and love, chicanery, folly, greed, and reckless courage. Spanning two years on the circuit, from Kentucky and California to New York and Paris, Horse Heaven, puts us among trainers, nervey jockeys, billionaire breeders, and restless track wives.