Buenos Aires, Argentina. Sebastián, a successful lawyer, leaves his ex-wife's condo, located on the seventh floor of an apartment building, to take his two children to school. While they run down the stairs, he uses the elevator. Once on the ground floor, Sebastián awaits the arrival of the children.
At the end of the 19th century, a girl whom everyone considers ugly, becomes, over time, an insignificant woman, ignored by all. Yet she observes the world around her with a strange eagerness and finds signs of beauty everywhere she looks. Years later, a French photographer already married and with children arrives at her house. He will be the only person capable of seeing the beauty and the richness of her intense inner world.
An administrative police officer, Franco Montero, receives as an inheritance the care of a half-brother that he did not know. Lorenzo Montero, a child prodigy with an IQ of 200 who changes his way of life and his work. The eleven-year-old's intelligence puts Franco and his assistant Gustavo Mansilla in charge of the homicide division. By deducing and exploring the three, they solve the most striking cases.