Te doy la vida

Elena, Ernesto and Nicolás had been a happy family until Nicolás was diagnosed with leukemia and needed an urgent bone marrow transplant. Ernesto and Elena are compelled to find their son's biological parents as none of the adoptive family members are compatible with him. They are unable to find the mother, but they do find Pedro his father, instead, who is shocked by the news since he had no idea he had a son. 

Ernesto and Elena are deeply grateful to him but demand him not to have any relationship with Nicolás. He agrees, understanding that Nicolás already has a life with his adoptive family. But fate has other plans and everyone's life will change completely.