Ethel and Miss Hardbroom make sure that Julie’s first day is a humiliating disaster.
Mildred is back at Cackles and now feels like she truly belongs.
Full of bitterness and resentment, Ethel is casting spells in anger – and slowly turning into an ugly swamp troll. Transformation complete, Cackles is in uproar at this hideous creature, and Miss Hardbroom banishes Troll Ethel to the forest. Is there still a shred of kindness inside Ethel which can save her, or is it too late?
Let down by her parents (again) Enid is feeling blue but she soon finds a new purpose when Maud's cat, Midnight, starts fading away.
A new game craze is sweeping the academy and everyones hooked. Soon the girls are fighting over it, then their magic begins to disappear... followed by the girls themselves.
When Julie’s magic spirals into destruction, Miss Hardbroom forces Mildred to face grim reality – her old friend Indigo turned into a stone statue after similarly losing control. Mildred saves Julie from the same fate by using a rare magical lichen, and rescues all the vanished people from Julie’s model. Julie forsakes magic and leaves Cackles, while Mildred is on her last chance – and now the keeper of Miss Hardbroom’s darkest secret.
Mildred’s woken with a crash and a bang as someone explodes into her room. It’s Indigo Moon. The potion Mildred used on Julie was so strong it also released Indie from her stone statue exile. This girl is a magical whirlwind, Miss Hardbroom’s worst nightmare, and soon wreaking havoc at Cackles. How is Mildred going to keep her secret?
When Indigo disappears after being humiliated by Miss Hardbroom again, Mildred and Maud track her to a TV talent show in a nearby city and wangle their way into the studio.
Faced with a mess before Indigo's examination, Mildred bewitches a broom -- and sparks a revolution. A mysterious witch comes looking for her dog.