Jockey Bill Davidson's accident seems suspicious to his friend Alan Yorke who goes back to check the fence where Bill Davidson fell, and finds length of wire on the ground. The wire disappears before the police arrive to check Alan's story, so he must find out what happened himself.

Jockey Bill Davidson's accident seems suspicious to his friend Alan Yorke who goes back to check the fence where Bill Davidson fell, and finds length of wire on the ground. The wire disappears before the police arrive to check Alan's story, so he must find out what happened himself.