Derren Brown sets out to prove he can predict the winner of a horse race, then does it seven times in a row. The show follows one woman as Brown talks her into betting on his picks, starting small and letting the winnings grow her confidence and her stake until she is wagering real money on a system she believes he has cracked. Brown narrates his own method afterward, walking through the psychological tools that built the illusion: subtle suggestion, persuasive framing, social proof, and anchoring, where a run of correct calls gets tied to positive feeling so the next prediction lands as more credible than it should. The trick is not clairvoyance but arithmetic and patience, a setup that quietly eliminates the wrong answers behind the scenes while the audience only sees the right ones stack up. Brown treats the reveal as the actual point of the special, using one woman's growing certainty as a demonstration of how ordinary persuasion techniques, applied in sequence, can make a stranger trust a stranger's judgment over her own.