Manon is innocent by the manager of the canteen, one of the only people to whom the teenager grants her confidence. Under the anxious gaze of the director, Madame Barthelemy, the French teacher, organized a puppet workshop. Against all expectations, she succeeded in fascinating the girls with a mythological narrative. Manon, who does not feel at ease in any of the center's professional workshops, is introduced to mechanics with his teacher, Lucas. After a successful public performance of the puppet workshop, everything collapses. Manon then organizes a night escape with two other girls ....