Mildred Hubble, the “worst witch” at Miss Cackle’s Academy for Witches, is determined to have a better term this time around. Unfortunately, disaster seems to follow her wherever she goes. When she is asked to look after the new girl, Enid Nightshade, things quickly spiral out of control.
 
At first, Enid seems sweet and well-behaved, but she soon proves to be even more mischievous than Mildred. From classroom chaos to broomstick blunders, Mildred finds herself in trouble once again—despite her best efforts.