In a small French town during the 1930s, a group of students from a boarding school embarks on a mischievous plan to confront the strict rules of their formidable headmaster, who is feared for his severity and disciplinary methods. One day, after a series of teasing about the group's "nerd," the students decide to orchestrate an elaborate coup that puts the headmaster between a rock and a hard place.
With the help of clever accomplices, they devise an ingenious role-playing game that allows them to swap identities, evading the headmaster’s watchful eye. Everything seems to be going wonderfully until an unexpected twist reveals that the old stickler has dark secrets from his own youth that could cost him dearly. As tension rises, the boys, in their attempt to create chaos and confusion, begin to discover their own limits and the importance of friendship and loyalty.
As the plan unfolds, unexpected conflicts arise, forging new alliances and rivalries among the students. The plot transforms into a fun and emotional showdown between authority and the desire for freedom, where each character must confront their fears and uncover who they truly are. In an exciting conclusion, the most valuable lesson of the entire scandal is that sometimes, the real learning happens outside the classroom.