Roberta (Ximenes饰) 与 Suzana (Duarte饰) 是一对姐妹，童年时受到祖母的折磨和严厉规条及社会传统观念的约束，如今她们计划绑架自己的祖母...

Roberta and Suzana are two sisters, both in their thirties, of totally different beauty and life styles, united by a common goal: to take revenge on their grandmother, a mean old woman who, in the past, turned the little girls' lives into hell, with her strict educational concepts. Since they were very young, the two sisters plan to kidnap the grandmother and now is the long awaited moment. Before Roberta and Suzana leave to the beach house, the setting of their grandmother's terrorist practices, Roberta, while waiting for Suzana at a restaurant, meets Renato, an extremely proper guy who ends up involved in this unexpected adventure. The two sisters' departure leaves Suzana's husband, Alberto, bewildered and he ends up being also part of a parallel mad adventure.

As irmãs Roberta e Suzana são perseguidas pelo desejo de vingança da avó, uma velha má que durante a infância as atormentava e torturava com conceitos rígidos de etiqueta e educação. O plano está pronto: Roberta e Suzana seqüestram a avó e a levam para a casa de praia da família, cenário das cenas de tortura feminina por que passaram. O advogado careta Renato e o marido de Suzana, o atrapalhado médico Francisco, entram na trama apimentando o ritmo do filme. Os personagens vivem em um emaranhado de emoções, sensações e situações interligadas que levam a um desfecho surpreendente e inesperado.