In the underworld of the city of São Paulo, there is a real business that is making money for a lot of people: fights. The small wrestling clubs attract many rich men who want to bet their fortunes on illegal disputes between poor men, who have to fight to survive and earn a few bucks.
Xavier, a pharmacist, lives peacefully in bigamy with his two women, Carmen and Beatriz, but the harmony breaks down when they find he has another lover, Monique, a nightclub dancer.