Horseracing is the sport of kings, perhaps because racehorses are very expensives animals. But when they win races, they can make a lot of money too - money for the owners, for the trainers, anda for the people qho put bets on them to win.
Dilver Blaze is a young horse, but already the winner of many races. One night he disappears from his stables, anda someone kills his trainer. The police want the killer, and the owner wants his horse, but 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.