"O Filho Único do Pai" tells the story of Lucas, a frustrated logistics analyst who tries to pull himself together after being betrayed by his fiancee. And when everything looked bad enough, Antônio, his father, an eccentric retired actor, reappears after a long time and forces his son to make decisions that will change the direction of his life.
On New Year's night, Sandro suffers a heart attack and needs to have an emergency transplant. He ends up receiving the heart of Isadora, a transvestite owner of a beauty salon who had died a few moments before, victim of a runover. After the transplant, Isadora, in spirit, starts to follow the publicist's steps. Meanwhile, Sandro begins to notice changes in his behavior and begins to see the world in a different way.
