Justine, a gifted and strict vegetarian teenager, enrolls in a prestigious veterinary school, entering the same world where her older sister, Alexia, is already a student. The school is known for its brutal hazing traditions, and during her first week, Justine is forced to consume raw meat as part of an initiation ritual. This unfamiliar and violent act triggers an unexpected and powerful craving for flesh within her, a desire that begins to manifest in disturbing ways. Despite her initially strong reluctance, Justine starts to embrace these newfound carnivorous tendencies, which begin to alienate her from her peers.

As Justine navigates the complex social dynamics of the school, including her roommate Adrien's laid-back demeanor in contrast to the more extreme behaviors of the student body, her appetite intensifies. Her relationships become increasingly strained as she struggles with her emerging urges, the pressure to fit in, and the clash between her old values and newfound desires. The deepening chasm between Justine and those around her underscores the tension between the human and animalistic natures that exist within her, and she is compelled to confront the darker aspects of her identity, heritage, and the true nature of her fleshly cravings.