Célène, at 17, is idealistic. She believes in absolute love, and is more interested in reading than in social networks. She is getting ready for living apart from her fiancé, Pierre, for a while, leaving Paris for Biarritz. Very quickly, she has to face the evil elite of her new school, ruled over by the former big-screen star and Instagram queen Vanessa and the celebrity surfer Tristan, who's both dangerous and seductive. Célène falls in love with him, but is a long way from suspecting that she is at the centre of a cruel bet between Tristan and Vanessa. Just how far will they go?