January 1st, 2003. As Brazil celebrates President Lula's historic investiture, two middle-class provincial families from Rio Grande do Sul gather in an old, poorly maintained house, around a champagne-fired barbecue, amidst family secrets and frustrations. Sunday (Domingo) could be a day like any other, a sweet and peaceful day. But the changes promised to the Brazilian people by the new president deeply worry Laura, the matriarch, who fears she will see her authority and wealth start to disappear.