Luis Palau is an Argentine evangelist. He's been called 'the new Billy Graham '. Over the past 17 years he has preached to five million people in 37 countries. This summer he's made a major effort to save British souls, leading a month-long crusade in London. Peter France follows Luis Palau through one of his big warm-up meetings at Wembley, examining his message and talking to those who claim it has changed their lives.