Marguerite is a brilliant mathematics student and the only woman in her class. On the day she is supposed to defend her thesis, the culmination of several years of work, in front of a committee of researchers, Marguerite realizes a mistake that shakes her confidence and compels her to start over from scratch. This drama, presented as a Special Screening at the Cannes Film Festival, addresses a crucial issue with precision: the burden of perfection and the glass ceiling that women encounter when trying to succeed in male-dominated fields.