Derren Brown sets out to prove that Christian faith healing can be faked convincingly enough to fool a paying crowd. He recruits an ordinary, skeptical member of the British public with no performing background and spends months coaching him in the techniques used by American televangelist healers: cold reading, stagecraft, crowd work, and the physical tricks behind apparent cures. The trainee, given a new persona and a preacher's wardrobe, is then sent to the United States to run a real healing service in front of an unsuspecting congregation, with hidden cameras capturing their reactions as he performs. Brown narrates throughout, breaking down each technique as it is deployed and checking in with his student's nerves and doubts along the way. The result plays as both an experiment and an argument, building toward the moment the fabricated healer takes the stage to see whether the audience notices the difference between real conviction and a well-rehearsed act.