Sir Richard Stewart, the racing authority chairman, wants Sid Halley to investigate suspicious race results. But Halley gave up investigating eight years ago, swearing he'd never go back. But then Sir Richard is found dead and Halley receives a threatening call from a man insisting he investigates the alleged race-fixing. Halley refuses, but when his young daughter goes missing he realizes he may pay the ultimate price. With his family in mortal danger, Halley acts.