It follows a group of girls who live at a "school" which educates them about how to be perfect young women for families that they are told will eventually adopt them.

[1][2][3] In an isolated, windowless boarding school called Vestalis, run with strict military precision, girls live on numbered levels and are taught to follow the "feminine virtues" of obedience, cleanliness, patience, gentleness, humility, loyalty and modesty while avoiding "vices" such as anger, curiosity and sentimentality.

They are told that the school protects them from the toxic outside air and that their lessons prepare them for adoption by members of high society, who only want the girls if they are "clean."

Best friends, Sophia and Vivien, line up with the other girls on Level 10 to wash their faces in front of a camera in an allotted, regimented time.

When they are returned to their dormitory, Vivien manages to escape into the hall, only to find that the outer door requires key card access.

Miss Brixil, talking to an unseen person on the phone, expresses concern about the behavior of a guard, Alex, warning that he should not be allowed around the girls unsupervised.

Sophia informs Vivien that Alex, the guard Miss Brixil was concerned about, secretly visits the dormitory and "touches" the girls while they sleep.

Alone, Brixil and Miro discuss the school's dwindling funds and the pressure being put on them (ostensibly by powerful criminals) to produce results.

While Sophia goes to get them, Vivien finds a video in the lounge revealing that the facility is actually a rejuvenation clinic run by Miro; the girls are raised in a sterile environment, with no exposure to damaging sunlight, so that their facial skin can eventually be transplanted onto rich buyers.

An exhausted Sophia and Vivien fall asleep inside the shed, awakening the next morning to find the door being broken down by a squad of police officers and emergency service workers, who already saved the other girls, aware of the crimes committed by Miro and Brixil.