Alexia, 25, strong-willed and idealistic, arrives as a trainee nurse in the closed ward of a psychiatric hospital, and meets Joëlle, the head nurse, who teaches her the job. Alexia is touched by the anger of Beline, a 20-year-old patient, who thinks she doesn't belong there. Despite Joëlle's warnings about keeping her distance from patients, Alexia gets close to Beline and puts all her energy into trying to get her out.