Svengali tells the story of Dixie, a postman from South Wales, and a music fanatic. All his life he’s dreamed of discovering a great band and then one day, trawling through YouTube, he finds them… ‘The Premature Congratulations’. He hunts them down and offers them his management services. They are young, arrogant, sexy and utterly magnificent. Putting their demo on a cassette tape, Dixie heads out onto the streets of London…

Joan Jett and Cherie Currie, two rebellious teenagers from Southern California, become the frontwomen for the Runaways — the now-legendary group that paved the way for future generations of female rockers. Under the Svengalilike influence of impresario Kim Fowley, the band becomes a huge success.