Snapdragon's Academy, of Spelling, Sorcery, Alchemy and Algebra (ONC 2025)

Prompt 75. You've worn a mysterious ring since childhood, but one day it opens to reveal a tiny creature telling you it's been trapped inside all along and more secrets are on the way.

Greta Shrub is about to turn fourteen years of age, but growing up in the home of her heartless Aunt, Mrs Vivora Grogan has not been easy. Enduring loneliness and cruelty, at the hands of her Aunt and her three spoilt cousins, Greta Shrub's stark and unfortunate childhood only acts to strengthen her resolve and her natural independence of spirit. These qualities of character prove especially essential when an unexpected and previously unknown visitor arrives at her door.
But what does her sinister Uncle Ulric know about Greta's past and future? And what is his interest in the mysterious Garnet Ring that Greta has worn about her neck since childhood?
And what is the Garnet Ring's relationship to the magical but mystifying occurrences that have become a feature of Greta's lonely life?
Do these curious incidents have any connection to a high-school named Snapdragon's Academy, that Greta has heard whispers about? Could this society be the key to her escape from her ruthless relations who wish to use Greta's new supernatural powers in their unscrupulous schemes?