The film begins with a school teacher bidding farewell to his students, who are leaving for the summer. As he is heading home he notices two of his students are hitch-hiking and picks them up. He invites them over for dinner and lodging, which they accept.. The majority of the film from this point on is set at the mansion, where the two students turn from guests to prisoners under the teacher's command.
In an Andalusian village in the early 70s, three daughters who lose their mother go up against the local community. Meanwhile, the unexpected arrival of their estranged brother brings to the surface secrets of the past.
Girls of a corrupt orphanage are being sold by the sadistic matrons to a badly disfigured doctor. His sinister motive is to use the girls as guinea pigs in his experimental brain surgeries.
