The future of Marguerite, a brilliant student in Mathematics at the prestigious Ecole Normale Supérieure, seems all planned out. Only woman from her promo, she is finishing a thesis she has to expose to an audience of researchers. On the D-day, a mistake shakens all her certainties and all her foundations collapse. Marguerite decides to quit everything to start all over again.

Nérac in the early 2000s. Laurie and Mila (13) dance on Gabber music, on the shores of a remote lake. Mila is in love with Laurie and she wants to tell her.