Horse racing is the sport of kings, perhaps because racehorses are very expensive animals. But when they win races, they can also make a lot of money—money for their owners, their trainers, and the people who bet on them. Silver Blaze is a young horse, but already a winner of many races. One night, he disappears from his stables, and someone kills his trainer. The police search for the killer, and the owner wants his horse, but they can't find them. So, what do they do? They write to 221B Baker Street, London, of course—to ask for the help of the great detective Sherlock Holmes.