This story begins with Marcelo's funeral. His family, his fiancée Lúcia and three suspicious men are the only people accompanying the coffin. By night, at home, Rosa, Ricardo and Lúcia notice something strange: Marcelo's room has been completely ransacked. Suddenly, the phone rings. Rosa answers and hears the voice of her son who had just died. The shock is too strong for the poor lady, who dies of a syncope. To understand these sinister events, we have to go back three days...
Disagreements between brothers and marital infidelity are just some of the consequences that the discovery of a valuable diamond causes.
Clementino is a postman who doesn't have much talent for the job and is six months behind in the payment of his apartment. While delivering a correspondence, he is kidnapped by a masked bandit, but manages to escape, and ends up helping the police in the capture of the whole gang, getting a lot of money as reward.