Three best friends make a pact to transform themselves into the glamorous women they've always wanted to be.

Nola Devlin has a secret identity. By day she is an overweight, frumpy, and overlooked editor at Sass! (the "celebrity magazine with an edge!"), but by night she slips behind her keyboard and into her alter-ego: Belinda Apple. Belinda is thin, gorgeous, British and the author of a trendy advice column- she is, in effect, the latest Carrie Bradshaw. Not even Nola's two best friends or her self-absorbed sister (who worships Belinda as the "sister she never had") know her secret. When "Belinda" jots off a column about how easy it is to lose weight, Nola is shocked when her best friends take her own lies to heart and urge her to follow Belinda's weight loss program. Since Nola can't reveal herself as the real Belinda Apple, she bites the bullet and joins her friends in making the "Cinderella Pact"- a last ditch attempt to lose weight (again!) and transform their lives for good.

But as the pounds come off, things don't turn out the way the three friends expect. Their journey of self-discovery leads to the return of an old love and the unmasking of new problems. Meanwhile, Nola finds herself torn between two different men as she stomps out fires caused by her deception as Belinda Apple and falls in love with the man who just might be her prince - or the rat in coachman's clothing.