The film stars Camille Prats in the title role, with the cast including Rio Locsin, Mat Ranillo III, Angelica Panganiban, Romeo Rivera, and Jean Garcia.

The rich yet selfish Lavinia Herbert (Pedersen), once the most popular girl in school, grows jealous of Sarah.

Out of greed, Miss Minchin (García) locked Sarah away in the attic, taking her possessions and forcing her into servitude to make her earn her keep, telling people outside that the girl had disappeared.

Upon the downfall of her perceived rival, a gloating Lavinia and her coterie of girls then torment Sarah and Becky.

Miss Minchin and Lavinia feel remorseful of their cruel actions and ask Sarah for forgiveness for all the cruelties they inflicted against her.