Sue Ellen "Swell" Crandell is a 17-year-old Los Angeles high school graduate who cannot afford to accompany her friends to Europe for the summer. When her divorced mother leaves on a vacation to Australia with her boyfriend, Swell looks forward to a summer of freedom with her siblings 15-year-old Kenny, 14-year-old Zach, 12-year-old Melissa, and 10-year-old Walter. Much to the children's dismay, their mother hires a live-in babysitter named Mrs. Sturak, a seemingly sweet elderly woman who assures Mrs. Crandell that she can take care of all five children. As soon as Mrs. Crandell leaves, Mrs. Sturak shows her true colors as a tyrant, angering the children. After Swell discovers Mrs. Sturak having died in her sleep in a chair, the children worry that their summer will be ruined if they notify the authorities. They stuff Mrs. Sturak's body in a trunk, dropping it off at a local
mortuary with a note that reads "Nice Old Lady Inside, Died of Natural Causes". However, the children realize that the spending money given by their mother to Mrs. Sturak was with the body when they dropped it off at the mortuary. In order to make ends meet, Swell takes a job at a fast-food restaurant called Clown Dog. She makes an impression on her co-worker Bryan, but soon quits due to their obnoxious manager. Swell then forges an extensive résumé under the guise of a
Vassar-educated young fashion designer and applies at General Apparel West (GAW), hoping to secure a job as a receptionist. Impressed by her résumé, the company's senior vice president of operations, Rose Lindsey, hires Swell on the spot as an executive assistant, much to the chagrin of Carolyn, a snooty receptionist who was initially in line for the job. The inexperienced Swell must balance the adult responsibilities of her work life while still trying to enjoy herself as a teenager. To support the family, she begins stealing from
petty cash at GAW, intending to return it when she receives her paycheck. She also begins a relationship with Bryan that becomes strained when she learns he is Carolyn's younger brother. After an argument about Swell's double life, she and Bryan angrily part ways. Resentful of Swell's promotion, Carolyn schemes with her co-worker Bruce to discredit Swell. Swell must also rebuff the unwelcome advances of Gus Brandon, the philandering vice president of marketing who happens to be dating Rose. Swell is furious when she discovers that her siblings have stolen from the petty cash funds in her purse to buy extravagant gifts, including a state-of-the-art home-entertainment center. When Swell learns that GAW is on the verge of bankruptcy, she takes it upon herself to create a new clothing line, with Rose suggesting they hold a fashion show to exhibit their new designs. With no petty cash left to rent a banquet hall, Swell offers to host the party, convincing her siblings to help clean the house, beautify the yard and act as caterers. During the party, Rose dumps Gus when Swell exposes his infidelity. Hoping to finally oust Swell, Carolyn presents Rose with a copy of Swell's driver's license to prove she is only a teenager. However, Rose deems Carolyn's efforts as petty jealousy and rebukes her. The party proves a success, with fashion buyers impressed by Swell's designs worn by her friends. The event abruptly falls apart when Bryan drives up to the house, hoping to reconcile with Swell. When he emerges from the truck, he is confused to see Carolyn there. Meanwhile, Mrs. Crandell arrives home early, forcing Swell to confess her lie in front of everyone. Rose forgives Swell for her deception because buyers were enthusiastic about the show, ensuring the future of the company. Rose offers Swell a job as her personal assistant, but she declines in favor of going to college. After Swell apologizes to Bryan, they make up and kiss. Mrs. Crandell then inquires about Mrs. Sturak. Two mortuary workers look over Mrs. Sturak's gravestone at the cemetery and plan to use the money found on her to visit Las Vegas. The gravestone reads: "Nice Old Lady – Died of Natural Causes". ==Cast==