Aitana is a nurse hired by Eloísa Arenas, an elderly woman who needs special care. Aitana strives to care for Eloísa and earn her trust, but her approach has an underlying motive, as she was abused by her patient's sons and has returned to seek justice. Eloísa's sons are Luciano, Iñigo, Mateo, and Bruno. Aitana arrives at the estate with the intention of gaining the trust of each of the brothers and thus, little by little, carrying out her plan. Aitana is surprised to run into Zacarías, the livestock technician at the Lizárraga ranch, who immediately recognizes her. Aitana was certain that Zacarías no longer worked for the family and that she would never see him again. For him, she was his first love, and she disappeared from his life without a trace. He has not forgotten her, despite believing her to be dead or missing. Although he is in a relationship with Ximena. Carrying out her plans, Aitana begins to feel attracted to Luciano, and this torments her.