Close to turning forty and away from his job as a librarian due to depression, Marcos needs to take care of Baby, his sister's pet dog. Isolated in an apartment in the city center, Marcos relies on the support of analyst Dr. Juliana R., who sees him in therapy sessions. Together, they look for ways to deal with the grief over the death of his ex-boyfriend, Pedro, and the arrival of a new love, Gabriel. Baby, a special hairless dog of Aztec origin, will redefine his relationship with the world of the dead and the living as well.