“Mexico’s upper classes are asking for trouble,” Michel Franco told last fall. With , trouble has found them. The deep-crimson dress selected by prosperous newlywed Marianne (Naian González Norvind) for the lavish post-wedding party at her family’s spotless steel-and-glass estate is couture at its most ominous; don’t look now, but there will be blood. In point of fact, Norvind’s lady in red has departed the premises by the time they’re overrun by gun-toting protestors bent on extracting cash (and pounds of flesh) from its proprietors and their guests. But lest anybody fear that Franco’s light-skinned scion of inherited wealth is set to get off easy, the film’s second half takes pains to detail her abasement, step by step, as she’s abducted,
