Jockey Kit Fielding's patron, Princess Casilia, is in trouble. Her invalid husband is being threatened by a ruthless business partner who wants to use the firm to manufacture arms. At the same time, some of the Princess's best horses are being killed - shot by a bolt. The only person the Princess can turn to is Kit - but he has his own problems. Between riding winners (and saving his impending marriage) Kit has somehow to find out and stop who is slaughtering the horses. But, as he's about to discover, the killer has more than horses in his sights.