Pixie and Molly are arch enemies, as different as sugar and spice. They are forced to leave home to attend high school and their parents have decided they will board together.
The problem of being forced to live together compels Pixie and Molly to become unwilling allies.
It's Pixie and Molly's first day at Willsford Ladies College but their new school is seemingly filled with nothing but mean teachers and insufferable classmates who want nothing to do with the new arrivals.
Poor Molly. Homesickness, eternal quarrels with Pixie, and the meanness of the sneaky little Jimmy have gradually driven Molly to despair.
Treated as social outcasts by the school clique, Molly, Pixie and Marguerite decide to join the Girl Guides in an effort to meet new friends. But there is one problem: Pixies grandmother can not stand the Girl Guides.
In the house of old Mrs Watson, mysterious things are happening: doors open and close for no reason, curtains whisper, furniture moves by itself, and pictures fall off the wall.
Pixie is out of tune. Previously she was cantor in the school choir but before the big district gala singing competition, Miss Orrick gives the position to Molly.
Aunt Vera has a great idea: she invites the whole family to a picnic in the countryside. Captain Jack chauffeurs grandma and Molly in a horse-drawn buggy while Pixie, Anne and Jimmy travel by automobile with Aunt Vera, a proven bad driver.
After listening to Marguerite and Esmerelda rave on about the heartthrob, Molly and Pixie decide to skip school with their friends to attend a matinee of the latest Rudolph Valentino film but they are spotted by Aunt Vera and Jacques.
The arrival of a barnstorming pilot and his mechanic brings excitement and near disaster to Willsford. The pair want to organise rides for the locals and for that they need two capable assistants.
Pixie and Molly have qualified for their Girl Guides' Airwoman's Badge, and are envied by the others in the class.
A remark about rabbits and 'multiplication' exposes Pixie's lack of knowledge about sexual reproduction. Unfortunately, Aunt Vera does not want to explain to her the facts of life and suggests she talk to grandma.
Hoping to join their friends on a Girl Guides camp out, Molly and Pixie take on odd jobs to earn the necessary money. But with only one week to accomplish their goal, their friends take an interest in their task.
The Girl Guides' camp out starts off on the wrong foot when Miss Orrick appears as a last minute replacement for Guide leader Miss Pittman. Furthermore, the surprise guest Patrol Leader turns out to be Anne who is a strict taskmaster.
Molly's attempt to organise a game of cricket among the girls from school ends in disaster.
Despite her tough exterior, the teasing about Molly's boyish haircut upsets her and she takes to wearing a hat all the time. A big celebration is coming up - Molly and Pixie are to be confirmed.
Miss Orrick informs the class that the end-of-term exams are close. Pixie is determined to top the class while Molly is aware that if she fails she'll have to repeat the year - at great expense to her parents.
The girls in Pixie's and Molly's class are excited when Miss Orrick informs them the end-of-year school entertainment is to be a tableau-vivant. Most excited is Molly, who has been given the lead role.
While the rest of the family is delighted with the end-of-term festivities at the tableau-vivant and the start of the holidays, grandma is annoyed by her constant struggles with the children and Aunt Vera's lack of independence.
The arrival of Pixie and Molly's parents sets the tone for holidays. When Jimmy goes in search of mistletoe for the Christmas party, he and Freddo are gone far too long.