Priscila Mel, the insatiable wife, invites a stranger into her marital bed, much to her husband's voyeuristic delight. Caught in the heat of a menage a trois, the trio explores forbidden territories, with Priscila's husband filming every sordid detail. The casada safada, or 'naughty married woman', takes charge, her moans echoing through their Rio de Janeiro apartment, as the corno, or 'horny husband', watches, hard and eager.