In an austere and remote all-girls boarding school, the most elite clique of girls are the illustrious members of the schools’ diving team. Their glamorous teacher Miss G (Eva Green) is the willing object of their adolescent fantasies, fueling the girl’s obsession with illicit nighttime excursions and fantastic scandalous stories. As Team Captain, Di is closest of all the girls to Miss G but her position is challenged when a beautiful Spanish girl, Fiamma, arrives at the school, immediately attracting the attentions of Miss with her beauty and maturity. Consumed with jealousy, Di encourages the group to bully their team mate, and Fiamma becomes isolated and vulnerable to the attentions of her teacher. With passion and jealousy running dangerously high, the girls plan a midnight feast, and the night unfolds with dramatic and disastrous consequences.