Seventeen-year-old blueblood Anna Percy leaves Manhattan to spend the second half of her senior year with her father in Los Angeles and quickly becomes tied up in the lives of the rich and famous at Beverly Hills High School, incurring the wrath of the "A-list" girls her first night in town for dating the boy they want.

While Anna's new job as intern on the hottest television show brings her into contact with an interesting new man and helps her see how possessive Ben has become, Cammie sets her sights on Adam.

The Hollywood girls make a getaway to the Palms Casino in Las Vegas where they put to the test the universal pact, whatever happens in Vegas stays in Vegas.