Жокей Билл Эвидсон погибает, упав с лошади во время заезда. Его друг художник Аллан Йорк убеждён, что смерть Билла — убийство, а не несчастный случай. Вместе с инспектором полиции Лоджем он разрабатывает хитроумный план с целью разоблачить босса мафии, контролирующего подпольный тотализатор на скачках.
As a surprise, two horse owners decide to ride their animals themselves in a steeplechase. But Bill Davidson's horse "Admiral" behaves weirdly, and falls hard after an obstacle. Bill dies from his injuries. His friend Alan York suspects the animal was doped by unscrupulous bookies and starts to investigate. He doesn't know how serious his opponents are, and that he's in danger to suffer the exact same fate as his friend.
After two friends have their houses looted of expensive paintings and vintage wine collections, Cleveland finds those responsible when he travels to Germany.
