A wealthy industrialist, Tristão Roque Brasil (Othon Bastos), is bitterly defeated in the elections for mayor. When his company almost launches a damaged product on the market, Tristan has a heart attack. At home, Tristan's life is even more disappointing. His wife treats him coldly and his children just want his money. The only joy is in the moments he spends watching operas. Tristão meets Mimi, a manicurist who takes him to what would be his first extramarital relationship.