A young man forces his sister to work as a prostitute to earn enough money to survive.

In 1965, a man named Matías is taken to a psychiatric hospital, after being found at the streets, "in the company of homosexuals and in a state of intoxication by alcohol and drugs". His documentation says he's 41 years old and born in Poland. He says his mother was an aristocrat. His arrival will have a profound impact on the institution and, especially, on one of the doctors.