The script is set in the countryside, during the summer of 1998. Cassandre is 14 years old. In the small family mansion, her parents and her elder brother mention that her body has changed. Thankfully, Cassandre is passionate about horse-riding and joins for the holidays a small equestrian centre where she gets adopted like a strange animal. There, she discovers another normality, one that gradually takes her outside of a stifling family unit...