Kathryn Merteuil and Sebastian Valmont are seductive, manipulative step-siblings who get what they want when they want it. Kathryn makes a bet with Sebastian: Sebastian must bed Annette, daughter of the headmaster at their school, before the end of summer break. Annette has stated that she would wait until love and marriage to sleep with a man. If Kathryn wins, she gets Sebastian's vintage 1959 Jaguar Roadster. If Sebastian wins, he gets Kathryn, the only girl he knows he'll never have. Also in play is Cecile, a naïve girl whose mother had enlisted Kathryn to help her fit in at her new school. However, Kathryn (with Sebastian's help) plans to ruin Cecile's reputation as revenge on Kat's ex-boyfriend, who left her for Cecile.

In 1978, in Broadway, the decadent and narcissist actress Madeline Ashton is performing Songbird, based on Tennessee Williams' Sweet Bird of Youth. Then she receives her rival Helen Sharp, who is an aspiring writer, and her fiancé Ernest Menville, who is a plastic surgeon, in her dressing-room. Soon Menville calls off his commitment with Helen and marries Madeline. Seven years later, Helen is obese in a psychiatric hospital and obsessed in seeking revenge on Madeline. In 1992, the marriage of Madeline and Menville is finished and he is no longer a surgeon but an alcoholic caretaker. Out of the blue, they are invited to a party where Helen will release her novel Forever Young and Madeline goes to a beauty shop. The owner gives a business card of the specialist in rejuvenation Lisle Von Rhuman to her. When the envious Madeline sees Helen thin in a perfect shape, she decides to seek out Lisle and buys a potion to become young again. Further, she advises that Madeline must take care of ... Written by Claudio Carvalho, Rio de Janeiro, Brazil