 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.