Celebrating the 20th anniversary of the first Harry Potter book, this documentary visits the real-life magical history behind J.K. Rowling's beloved classics. With footage from the British Library's exhibition, and exclusive access to a priceless collection of artefacts, take a tour around the mesmerising journey creating this global phenomenon. Includes interviews with J.K. Rowling herself as she examines the most exciting items on display, and opens her private archive to reveal drawings and drafts that have been hidden away for years. And, as opening night arrives, famous fans marvel at this fascinating trove of delights, like Harry Potter seeing Diagon Alley for the first time.