In an austere and remote all girls boarding school, the most elite clique of girls are the illustrious members of the schools' diving team, lead by Di (Juno Temple). The girls compete for the attention of their glamorous teacher Miss G (Eva Green), and Miss G in turn thrives on the attention she receives from her girls and believes it is her role to teach them the ways of the world. When a beautiful Spanish girl, Fiamma (Maria Valverde), arrives at the school and joins the diving team. DI, pulls rank as team captain and lays down the rules in an attempt to assert her position but MISS G is spellbound by Fiamma's beauty and maturity and becomes obsessed with her new favourite girl.