Roald Dahl's Matilda the Musical

In a hospital maternity ward, while other parents celebrate their newborns, the vain Mrs. Wormwood is furious about missing a ballroom dancing competition, and her husband Mr. Wormwood — a dishonest used-car salesman — is disappointed to learn the baby is a girl. They name her Matilda and proceed to neglect and emotionally abuse her throughout her childhood. Despite this, Matilda grows into a sweet, precociously intelligent child who devours books and visits the local library daily, befriending the warm librarian Mrs. Phelps. To entertain Mrs. Phelps, Matilda invents an ongoing serial story about an escapologist who falls in love with and marries an acrobat. At home, Matilda endures her father's contempt and her mother's indifference; she retaliates in small ways, such as adding peroxide to her father's hair oil and turning it bright green. On her first day at Crunchem Hall Primary School, she and her new friend Lavender are immediately warned about the school's harsh conditions. In class, Matilda solves a complex mathematical equation on the board and reveals her passion for reading. Her kind teacher Miss Honey is astonished by Matilda's abilities and petitions the terrifying headmistress Miss Trunchbull to move Matilda to a more advanced class. Miss Trunchbull — a former Olympic hammer-thrower who runs the school like a prison — flatly refuses, insisting no child may be an exception to her rules. Matilda learns of the Chokey, a tiny cupboard lined with sharp spikes used as a punishment cell. When a student named Bruce Bogtrotter is accused of stealing Miss Trunchbull's cake, he is publicly humiliated by being forced to consume an enormous chocolate cake in front of the whole school. Meanwhile, Matilda continues her story for Mrs. Phelps: the acrobat, pregnant, is forced by her contract to keep performing a dangerous act and is injured; she dies shortly after giving birth, and the child is placed in the care of the acrobat's sister, who turns out to be secretly cruel. Back at school, during a physical education lesson, Matilda discovers she has telekinetic powers — she can move objects with her mind when angered. She begins to piece together that Miss Honey's tragic personal history mirrors the story she has been inventing: Miss Honey was orphaned young and raised by an abusive guardian aunt who turned out to be Miss Trunchbull herself, and who has cheated Miss Honey out of her own parents' estate. Armed with this knowledge and her growing telekinetic abilities, Matilda uses her powers to write threatening messages on the blackboard during one of Miss Trunchbull's classes, impersonating the ghost of Miss Honey's father. Miss Trunchbull is terrified, flees Crunchem Hall, and disappears. With Miss Trunchbull gone, Miss Honey is able to reclaim her parents' home and estate, and she becomes the new headmistress. The students celebrate by renaming the school and renovating it with a new playground. Matilda's powers fade once she no longer needs them. Her parents, caught up in a shady car-dealing scheme, flee to Spain with her older brother to escape the authorities, leaving Matilda behind without a second thought. Miss Honey formally adopts Matilda, and the two begin a new life together. When Matilda finishes telling her story to Mrs. Phelps, the librarian is overjoyed to learn that Matilda's own life has become the happy ending she was narrating all along.

Sources: Wikipedia, Fandom (roalddahl.fandom.com search result)