Mari and her friend Déia discover about the affair of her husband with another woman in a accidental phone call.

Duda (Stulbach), a business man who is about to receive a fortune that'll allow him to open new factories, decides to live a straight life, breaking up with his lover and becoming an honest man. However, in his last date with the lover, his cell phone accidentally dials his wife's number - and she starts to listening everything that is happening through her car's speaker phone. Meanwhile, Duda's partner is trying to steal all his money and two inexperienced thieves are going to complicate the situation even more by kidnapping Duda and his lover.—Anonymous

During a quarrel, Karina accidentally presses the redial key on her lover Duda's cell phone. Mari, Duda's wife, answers the phone and she and her friend Déia start listening to Duda's hidden life, which includes a mistress, infidelity, stealing, fishy money transactions, kidnapping and even a murder attempt.—[email protected]

A cell phone belonging to a cheating husband and thief (Dan Stulbach) is accidentally left on "hands free" (thus the film's title - viva voz in Portuguese). This happens while connected to his wife's - Mari's cell phone, which she switches to "hands free" while driving around town, and by chance hears all these secrets. Starting then, Mari and her friend, Déia, listen to confessions and planned evil plots, and decise to follow those involved, while careful to leave the cell phone on, so they don't lose one detail while inside the car. In so doing, they not only witness a series of absurd events, but also uncover secrets of multiple betrayals, robberies, murder attempts and kidnappings, which may forever change the paths of all of the characters' lives.—Gonz30