Based on The Worst Witch books by Jill Murphy (published 1974–2013), the film follows Mildred Hubble living an ordinary life with her mum Julie, until the day that Maud Spellbody crashes her broomstick into their balcony and nothing is ever the same again. Maud introduces Mildred to Cackle's Academy - a school for young witches set high on a mountaintop. Season 2 is released on 8 January, 2018.