The day by day of two twin sisters in a college for girls in the England of 19th Century.

The series is an adaptation of the "St. Clare's" novel series (1941-1944) by Enid Blyton. The setting is an English girls' boarding school. The twin sisters Patricia "Pat" and Isabel O'Sullivan are send there against their will, as they actually wanted to attend a more expensive school with their former classmates. They are initially perceived as snobs by their new classmates, who mostly dislike and avoid them. However they soon bond with a few other girls, and gain an appreciation for some of their teachers.—Dimos

Patricia and Isobelle O'Sullivan arrives at the St. Claire, a college for girls to study and live in there. In this place they meet to Alison, Wella, Catherine and Doris, who live too in the St. Claire, and that join them in their team spirit of sympathy and friendship. All together, the girls play games and fun long time living in harmony until that appears Winfred, a sulky rude and antisocial girl that no will doubt to create all kind of troubles for the O'Sullivan twins and their friends due to the hate and jealous she has about all them.—Chockys