The servant Juarez kills his boss to marry his wife, who is his lover, but their son Mário Soares flees. Juarez becomes a rich man, and twenty years later his wife dies. He hires a gang to find his stepson since he does not want to share 50% of his fortune with the heir. Mário was raised in a small town in the country and changed his name to Fábio da Cunha. He is engaged and will marry Maria Alves, whose mother raised them together. However, Juarez and the gangsters put the town under siege and try to find Mário Soares. When Juarez sees Maria, he imprisons her husband to force her to become his mistress.