Laços de Sangue (TV series)

1984. A wealthy family decides to spend the afternoon near a river in the north of Portugal. The kids, Ines and Marta, start fighting over a doll and both fall into the river. Their father manages to save Ines but dies trying to rescue Marta. A couple, whose daughter has just died, find Marta and decides to take care of her as their own child and run away to Lisbon. They decide to call her Diana, the name of their dead daughter. 2010. Diana, who always repulsed her poor life, hears a conversation between her parents about the past and discovers she is not their biological daughter. She starts exploring the past and finds who her true family is. Meanwhile, Ines lives a good life with her mother, brother and fiancé. Diana starts interfering in Ines' life, without saying anything about who she really is. Her purpose is to destroy everyone who first destroyed her life in the past. - IMDb