Ex-jockey Sid Halley is asked to investigate possible doping of the horses of thoroughbred trainer George Casper - whose once-successful mounts have been failing spectacularly on the race track.
At the same time he learns that a conman has left his ex-wife Jenny facing a jail sentence over a fake charity, while the Jockey Club want him to look into certain powerful syndicates who may be acting in a ruthless and illegal manner.
Three dangerous cases, three ways to die - Sid is back on home turf . . .