Sangue Oculto (English title: The Secret)[1] is a Portuguese telenovela produced by SP Televisão and broadcast by SIC.

[3][4][5][6] Thirty years ago, Vanda found out that Teresa, a housekeeper working at her home, was pregnant of twins from her own husband Olavo.

While he was on a diplomatic mission abroad, Vanda seizes the opportunity to make Teresa hide her pregnancy by promising to help her with money, all the while planning for a way to getting rid of her.

With no way to contact Olavo, Teresa is forced to comply with Vanda, oblivious to the fact that she intends to take advantage of her pregnancy for herself, as her inability to bear children is one of the reasons for her marriage being strained.

[16] Almost a year later, the first scenes began to be filmed in Almada, in Costa da Caparica, with the rest of the cast in the same month, respectively on the 15 July 2022, and also later in SP Televisão studios.