Mrs. Géquil is an eccentric teacher despised by her colleagues and students. On a stormy night, she is struck by lightning and faints. When she wakes up, she feels different. Will she now be able to keep the powerful and dangerous Mrs. Hyde contained?

„This is a film about school or, more precisely, about the difficulty inherent in the transmission of learning. Indeed, Madame Géquil’s tardy educational success will „burn her wings“ (and the rest). Only by becoming another woman will she be able to pass something on to her students at last. Except that this other woman won’t stop there! Her newfound authority is merely one stage in a headlong movement that is beyond Madame Géquil’s control. In short, the transformation that has allowed her to realize herself finally as a teacher will turn out to be very dangerous. No metamorphosis is entirely harmless: who can say how far the internal changes that allow us to find success at last really go?…“ – Serge Bozon, film director