In a lively classroom, Amélie and Charlotte were thrown into a panic when reminded they had forgotten to organize Madame Dupont's promised birthday party. Seeking help, they enlisted classmates Alex and Philippe, and the four quickly brainstormed ideas in the school canteen for decorations, a cake, and a class card, with Alex and Philippe hinting at a secret surprise. As Amélie and Charlotte handled decorations and a gift, Alex and Philippe prepared their special contribution. Their preparations were briefly interrupted by the school Director, but he ultimately allowed the celebration to continue after recognizing the students' sincere efforts. Madame Dupont arrived, touched by the decorated classroom and warm welcome. Alex and Philippe then revealed their unique surprise: a video compilation of heartfelt thank-you messages from her former students, praising her impact. This emotional tribute deeply moved Madame Dupont, concluding the joyful and successful celebration.