In order to learn how to be responsible, two wealthy teen sisters are forced to work in the family business by their exasperated father. When company funds goes missing, it's up to the girls to save the day.
When the prospect of an Elwood City concert by the Backstreet Boys drives everyone else into a frenzy, a disgusted Francine decides to counter with an "anti-cute" band of her own called U Stink. But things don't go quite the way she had planned.
When Madeline's long lost uncle Horst arrives to take her to a Viennese finishing school, Miss Clavel, the eleven little girls and Pepito realize that something is not right.